OCCURRENCE AND DENSITY OF SHELL IN THE

VICINITY OF SEVENFOOT KNOLL, MAN O'WAR

SHOAL, SIXFOOT KNOLL AND AREA B

by Robert Cuthbertson

Maryland Geological Survey 2300 St. Paul Street Baltimore, MD 21218

Coastal and Estuarine Geology Program

File Report No. 56

July 1988

TABLE OF CONTENTS

List of Figures.

Page

2

List of Tables. ...... ... . . . .. . . . . . . . . . . . . . .. . . . . ... .. . .. .. . . . . . . ... . . 3

Executive Summary. 4

Introduction. . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . 5

Methods . .. ,. • • • ,. • • • • " .. II .. . . ... .. .. .. .. .. .. .. .. .. . II .. .. .. . .. ,. ................. ,. ........... " .. .. 5

Results . .. .. .. . . .. . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . . .. .. . . .. .. .. .. .. .. .. . . . .. .. .. .. .. .. .. .. . . .. . . .. .. 15

Sevenfoot Knoll. .... ....... ....... ....... ................ ................. ............ 15

Man 0' War Shoal . . . .. . . . . . . III . . .. . .. .. . .. .. . .. . . . I I .. • .. .. • .. .. .. .. .. .. • • .. • .. .. • • 1 5

Sixfoot Knoll.......... ... .. ........... ............ . .. ........ ... 24

Area B..... .. .......... .. .......... ..... .. ............... .............. .... ......... 24

Discussion.. • • • • • • • • • • • .. • • .. • • • • • .. .. • .. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 24

Sevenfoot Knoll. .. . . . . . ... ... ... ... . . . . . . ... . . . . . .. . . ... ... . . . . . . . ... 2�

Man 0' War Shoal............................................ 25

Sixfoot Knoll.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .. . . 27

Area B .. . . .. . . . ... . . . ...... . . . . . ... . . ..... . . .. . .. . . . . . . . . . . . . . 30

Conclusions. . . . . . . . . . • . . . . . . . . . . . . . . . . . . • . . . • . . . . . . . . . . • • . . • . . . . • . 30

References. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • .. • • .. • • • • .. • .. .. • • • .. .. .. .. • • 32

Appendix A

Appendix B

Appendix C

Seismic Data . ..... ... . . . . . ....... ........... . . . . ......... ..... . ...... . . . ..

Core Data ............................................. .. .

Mathematical Calculations . • • • • . • . . • . . . . • • • . • . • . • • • • • . •

1

33

36

70

LIST OF FIGURES

Figure 1. Charts showing proposed areas for seismic subbottom reconnaissance and vibracore groundtruthing. .. .. . . . . .. . 6

Figure 2. Location chart showing coring sites for Sevenfoot Knoll, Man O 'War Shoal and Area B and track lines for seismic subbottom reconnaissance in vicinity of Man 0 t War Shoal.. .. . . . . . . . .. . . . .. .. ... .. .. . .. . . . .. . . . . . 10

Figure 3. Chart showing track lines for seismic subbottom reconnaissance in vicinity of Sixfoot Knoll . . . . . • . . . . . . 12

Figure 4. A contoured chart showing number of bushels of shell per square yard of bottom disturbed for Sevenfoot Knoll, Man O 'War Shoal and Area B ( on surfaces to bottom of shell bearing layer ) .... .. .. ... .. . .. ... .. ... ... ........ 16

Figure 5. Section from seismic record along track line 1 at Man O 'War Shoal ( between LORAN fix marks 1-1 and 1-2) with core #11 location indicated. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 6. Section from seismic record along track line 2 at Man O'War Shoal ( between fix mark 5 and end of line ) with core #3 location indicated. . . .. .. . . .. ... . . . . . . . . . . . . ... 20

Figure 7. Section from seismic record along track line 3 at Man O 'War Shoal ( between LORAN fix marks 3-3 and 3-5)...... 22

Figure 8. Section from seismic record along track line at Sixfoot Knoll ( between LORAN fix marks 1-1 and 1-2).... 28

2

LIST OF TABLES

Appendix 1

Table 1. Corrected track line fix marks for seismic subbottom profiles in vicinity of Man O 'War Shoal . • • • • • . • • • . • • • • • . 34

Table 2. Corrected track line fix marks for seismic subbottom profiles in vicinity of Sixfoot Knoll • • • • • • • • • • • • • • • • • • • 35

Appendix B

Table 3. Core logs recorded by the Exmar Company of Norfolk, Virginia............................................. ... 37

Table 4. Corrected core locations • . . . . . . . • . . • • • . . • . • . • . . • . . . . . . • . 64

Table 5. Weight of shell ( g ) for each core section ( shells greater than 1/2 inch ) . .. ........ ... . .. . . ..... . . .. .......... .... 65

Appendix C

Table 6. Mathematical formulas used for calculations in this report............................. ................... .. 71

Table 7. Basic measurements and calculation of pounds of shell per cubic yard of bottom • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 72

Table 8. Calculated quantities of shell )1/2 inch per square yard of subbottom disturbed ( to bottom of shell bearing layer.. ... ............. .. ... .... . ... .. .. . .. .. ...... .... . 73

Table 9. Digitized information from Figure 4 and calculation of amount of bushels for study areas • • . . . • . • • . . . • • • . . . • . • . . 74

3

EXECUTIVE SUMMARY

This study delineated the shell-bearing zones in the subbottom and

estimated the amount of shell present in the areas known as Sevenfoot

Knoll, Man Q'War Shoal, Sixfoot Knoll and Area B. Interpretation of

subbottom records for Man O 'War Shoal and Sixfoot Knoll and vibracore data

for Sevenfoot Knoll and Man O 'War Shoal allowed volumetric estimations of

the quantity of shell. The amount of shell calculated in the vicinity of

Sevenfoot Knoll was 7.56x106 bushels and 94.5x106 bushels in the Man O'War

Shoal area.

4

INTRODUCTION

The objective for the study was to locate areas containing sufficient

shell occurrence and density for the Shell Repletion Program. This is an

ongoing program that supplies shell for the purpose of creating a base on

which oyster spat may grow and therefore new shell resources need to be

discovered for the program to continue. The Fisheries Division, Tidewater

Administration, Department of Natural Resources monitors the progress and

needs of the dredging contractor in supplying shell for this program.

Sevenfoot Knoll, Man O'War Shoal, Sixfoot Knoll, and Area B, northern

Chesapeake Bay, Baltimore and northern Anne Arundel Counties, were chosen

as the most likely areas to contain the amounts of shell required to

fulfill the needs of the program (Figures 1). Investigation of these

areas was performed by the Maryland Geological Survey at the request of

the Fisheries Division. The Survey conducted seismic reconnaissance in the

vicini ty of Man 0 'War Shoal and Sixfoot Knoll and analyzed vibracores

collected by the Exmar Company of Norfolk, Virginia from Sevenfoot Knoll,

Man 0' War Shoal and in Area B east of Man 0' War Shoal.

objectives of this report were:

The specific

(1) to delineate the shell bearing strata in the suggested areas by

analyses of seismic subbottom records and vibracores and

(2) to calculate the volume of shell present for the areas under

study from analyses of the vibracores.

METHODS

In order to accomplish the stated objectives three primary methods

were utilized: (1) seismic subbottom surveying, (2) bottom sampling and

(3) calculated projections of densities and total amounts of shell present

in each of the designated areas.

5

FIGURES 1 . CHARTS SHOWING PROPOSED AREAS FOR SEISMIC SUBBOTTOM RECONNAIS­

SANCE AND VIBRACORE GROUNDTRUTHING

6

'B..HHHH 10

39°12'15"

76°20'25"

AREA 8 39°11'20"

76°23'30"

39°11'00"

76°23'30"

MAN O' WAR SHOAL

39°11'00"

76°21'51"

39°10'43"

76°21'40" 76°21'00"

SEVENFOOT KNOLL

39°08'58"

76°23'18" 39°08'53"

76°22'09" �------.:...�

SIXFOOT KNOLL

39°07'57"

76°22'23"

8

39°08'20"

76°21'41"

39°11'08"

76°20'22"

1) Seismic subbottom reconnaissance surveys were conducted in the

vicini ty of Man 0 'War Shoal and Sixfoot Knoll. There were five track

lines followed along the 42xxx LORAN range lines for each of the two areas

(Figures 2, 3). The track lines varied from 350 to 500 yards apart. LORAN

T-O fix marks were recorded at the beginning and end of each track line

and at approximately 900 yard intervals. LORAN T-O coordinates for the

seismic record were corrected in accordance with correction factors

developed by Halka (1987) (Appendix A; Tables 1, 2).

A Oatasonics SBT-220 (5kHz transducer) continuous seismic reflection

system produced acoustic pulses under the water surface directed at the

bottom. The returning signals from the subbottom provided a graphic

record on a chart recorder (EPC model 3200S) of the reflecting horizons

within the subbottom stratigraphy.

Sevenfoot Knoll and Area B, probable shell resource areas, were

omitted from seismic subbottom reconnaissance due to budget and time

constraints.

2) Bottom sampling involved the analyses of 25 vibracores collected

by the Exmar Company of Norfolk, Virginia (Figure 2, Appendix B; Table

3). Cores were collected independently of the seismic track lines. Four

cores were collected in the Sevenfoot Knoll area, 20 in the vicinity of

the Man O'War Shoal priority area, and one in Area B. Cores were not

collected in the vicinity of Sixfoot Knoll. LORAN T-O coordinates for the

bottom sample locations were corrected in accordance with correction

factors developed by Halka (1987) (Appendix B; Table 4). The vibracore

barrel length was 40 feet and had a diameter of three inches. The

Tidewater Administration supplied Latitude/Longitude coordinates for the

coring locations, a barge with a crane to lift the coring tower, and the

9

FIGURE 2. LOCATION CHART SHOWING CORING SITES FOR SEVENFOOT KNOLL, MAN O'WAR SHOAL, AREA B AND TRACK LINES FOR SUBBOTTOM RECONNAISSANCE IN VICINITY OF MAN O'WAR SHOAL.

10

390I2'OO'

r'-------------r------------r-----------.-------------,------7r---"""'Tj----,

c HE

II' +

j 10' +

s .AI.

CUlfiHlll tHIUEl fRONT UIII&[ lKHT ."

£>

p E .AI. K E B .AI. y .,.

0,.

C) o

SOL � � 18 �0 += � + -0- ---0- + -:-6-L ---0----. /" .,\ . """"'""EOL 3 EOL 4 0---__ _

�,-�-----'0" 0 � -<>--- � -0 � '0,"

., SOL 4

\.." + +

•

+ ) /.

� �

0

J" 0

0

SOL - START OF LINE EOL - END OF LINE

�S'09'OO' I I , / I, I , ! , I 39"09'00'

1602�'OO' 24 n 22 21 1Iio20'OO' o �oo 1000 YA"OS HE3E3HE3'

FIGURE 3. CHART SHOWING TRACK LINES FOR SEISMIC SUBBOTTOM RECONNAISSANCE IN

VICINITY OF SIXFOOT KNOLL.

12

39°09'00"

,8

o

39°08'00"

()

D

o + +

I� -

I

0-'",,'� '>. "" + ----r.\ SOL 21 76021'41" SOU &- \\ ) --0\ \� -0- --r. roll

+ 39°07'57" •. 76022' �3"

+

SOL 5 0- -0----0 EOL 5

..

I

I

l ________________________________________ ��---------1/ �----------------------�/���----------�(��----------------(���( 39°07'30" I _ _ 76°24'00" 76° 23'00" 76°22'00"

Sixfoot Knoll o 500 1000 YAROS F3 F3 F3 F3 E3

SOL - START OF LINE EOl - END OF LINE

EOL I

tugboat "Big Lou". The cores were cut in sections approximately five feet

in length for ease of transportation and examination. The sections of

each core containing shell were washed through a 1/2 inch sieve using a

Teel centrifugal pump. The 1/2 inch sieve was chosen because the final

shell screen size of a dredge is 1/2 inch. The shells were dried for

several days before weighing. The weight of the shell fraction of each

section of core was recorded (Appendix B, Table 5). No grain size

analyses of the sediments in the vibracores were performed. The

designation of silt in the core logs was reclassed as the general category

mud except when reference was made directly to the core log (Appendix B,

Table 3).

3) The third method of the project correlated seismic subbottom data

with vibracore data for estimates of occurrence and density of shell in

the Sevenfoot Knoll and Man O'War Shoal areas. Estimates of shell

occurrence and density were omitted for the eastern section of the Man

O'War Shoal priori ty area, Sixfoot Knoll and Area B due to insufficient

vibracore information.

The formulas for the calculations of shell volume were reported by

Hobbs (1987) and those formulas along with other calculations are listed

in Appendix C; Table 6. There are two differences, however, between

Hobbs' (1987) work and this report; (1) the size of a bushel and, (2) the

average weight of five gallons of shell. The Maryland bushel is equal to

2800.9 cubic inches (.060 cubic yards) whereas a Virginia bushel is equal

to 3003.9 cubic inches (.064 cubic yards). For volumetric determinations

several five gallon pails containing shell )1/2 inch were weighed. The

average weight of five gallons of shell was 32 pounds. The 32 pounds of

shell per five gallons equals 1293 pounds per cubic yard compared to the

14

28 pounds of shell per 5 gallons or 1084 pounds per cubic yard reported by

Hobbs (1987). The density of shell (pounds of shell per cubic yard of

bottom) determined the quanti ties of shell per square yard of bottom

disturbed for the shell-bearing layer (Appendix C, Tables, 7, 8).

The number of bushels of shell for Sevenfoot Knoll, Man O'War Shoal

and Area B were plotted on a chart at a scale of 1:20, 000, contoured and

digitized using a Hewlett Packard 9825T desktop computer (Figure 4 ) . From

the digitized chart the total number of bushels were calculated (Appendix

C, Table 9).

RESULTS

Sevenfoot Knoll

The four vibracores collected in this area indicated five feet of

soft gray mud overlying a mixed shell-gray mud layer (Table 3). The lower

boundary of the shell bearing layer in each vibracore was delimited by the

presence of coarse sand. The thickness of the shell bearing sediments

varied from 21.2 to 31. 5 feet (Table 5).

Man O'War Shoal

The three seismic subbot tom reconnaissance profiles wi thin the Man

O'War Shoal priority area showed strong acoustic impedence in the first

six feet of bottom sediments (Figures 5-7). The impedence varied

vertically and horizontally throughout the seismic records.

The 20 vibracores collected in this area indicated a mixed shell-gray

mud layer overlying a coarse sand wi th only four cores (111, 2, 5, 7)

containing a gray mud overburden (Table 3). The length of the shell

bearing section varied from 11.5 to 36. 8 feet.

15

FIGURE 4. A CONTOURED CHART SHOWING NUMBER OF BUSHELS OF SHELL PER SQUARE YARD OF BOTTOM DISTURBED FOR SEVENFOOT KNOLL, MAN O'WAR SHOAL AND AREA B (ON SURFACES TO BOTTOM OF SHELL BEARING LAYER).

16

'8 + � a:l + +

cd QI '"' -<

+

�

'<q

� "1:1 a + . +

�

! -

g ..cI G) 00

'"'

� � 0

0

� "::I + + '<q

� �

� --

g '<q � i<1J

� H ..

� � !� +

1� + + � � �

H.< �i ��<1J �i ��

"8 ":c

'n � "s

-

1;

FIGURE 5. SECTION FROM SEISMIC RECORD ALONG TRACK LINE 1 AT MAN O'WAR SHOAL (BETWEEN LORAN FIX MARKS 1-1 AND 1-2) WITH CORE #11 LOCATION INDICATED.

18

� w w �

o

30

60

90

WEST

OUTGOING SIGNAL

'I --

SITE OF CORE #11 SUSPECTED SHELL GRAY SILTY CLAY OVERBURDEN

WATER SURFACE 1 WATER-SEDIMENT INTERFACE MULTIPLE

N I

....

NAVIGATION FIX MARK

a 100 200 300 YARDS r-------,.-------T� _ _ � � -�

EAST

10/6/87

FIGURE 6. SECTION FROM SEISMIC RECORD ALONG TRACK LINE 2 AT MAN O'WAR SHOAL (BETWEEN FIX MARK 5 AND END OF LINE) WITH CORE #3 LOCATION INDICATED.

20

� w w u..

o

30

60

90

WEST SITE OF CORE #3

OUTGOIN G SIGNAL 1

N � C w

NAVIGATION FIX MARK

WATER SURFACE

o

SUSPECTED SHEll

100

WATER-SEDIMENT INTERFACE

. I . . :

I I 1\

200 300 YARDS L--=--: -- _�

EAST

MULTIPLE

Ln I 10/6/87 I

N

FIGURE 7. SECTION FROM SEISMIC RECORD ALONG TRACK LINE 3 AT MAN O'WAR SHOAL (BETWEEN LORAN FIX MARKS 3-3 AND 3-5) .

22

.­w w u..

o

30

60

90

WEST SUSPECTED SHELL

GRAY SILTY CLAY OVERBURDEN WATER SURFACE

q­I

M

OUTGOING SIGNAL

WATER-SEDIMENT INTERFACE

NAVIGATION FIX MARK

o 100 200 300 YARDS

EAST

MULTIPLE

10/6/87

Sixfoot Knoll

The sections of seismic profiles from track lines 1-4 wi thin the

designated Sixfoot Knoll area showed strong acoustic impedence within the

first six feet of bottom sediments. There were sections present where the

impedence was present at the water-sediment interface.

Area S

One core was taken in this area. The core log showed approximately 4

feet of gray mud overlying a mixture of shell and gray mud approximately

23 feet thick. The shell bearing zone was bounded on the bottom by sand

(Appendix S, Table 3) .

DISCUSSION

Sevenfoot Knoll

The core logs when compared to the sieving analyses present possibly

conflicting data (Appendix S; Tables 3, 4) . The core logs show a layer of

soft gray mud (4-5 feet thick) overlying a layer of shell with soft gray

mud. The sieving analyses shows that shell was present for the first six

feet of bottom (Appendix S, Table 4) . The reason for this discrepancy was

probably due to either visual inspection of the core through the core

liner with the dark gray mud occluding a view of shells, or that the

sieving data was summary data for each section and therefore horizons

could not be delineated.

The shell bearing sediments thickness varied from 21.2 to 31.5 feet.

However, when the weight of shell fell below the 1000 gram level the

densi ty of shell was much reduced. The thickness of shell wi th the

highest densities varied from 16.2 to 26 feet. This suggests that

shellfish colonization was spatially variable.

24

Calculations based on core data indicated there are approximately

453,750 cubic yards (7,562,500 Maryland bushels ) of shell within an area

of approximately 20 8,725 square yards in the vicinity of Sevenfoot Knoll

( Figure 4, Appendix C, Table 9) . This yields an average of approximately

2. 2 cubic yards (36 bushels ) of shell for each square yard of subsurface

material dredged to the bottom of the shell bearing layer.

Man 0 'War Shoal

There were three seismic subbottom reconnaissance profile tracks

conducted within the Man O'War Shoal area. The records from track lines

1, 2, and part of 3 delineated the extent of the shell bearing layer. The

records suggest that a shell resource is present throughout the Man O'War

Shoal area.

interface.

The deposit varies in depth below the water-sediment

To substantiate the interpretation of the seismic record

vibracores were needed. Only two vibracores, #3 and #11 were in

proximity of the track lines to support the seismic interpretation ( Figure

2) •

Track line 1 borders the northern edge of the priority area at Man

O'War Shoal. A strong acoustic impedence ( reflector ) was recorded varying

in depth below the surface of the bottom between 1. 5 and 6 feet as seen in

Figure 5. The strong reflector was interpreted to be a dense shell layer

with a less dense gray mud and shell overburden.

Vlbracore 1111 is located approximately 250 yards east of LORAN fix

mark 2 on track 1. The vibracore log ( Table 3) indicated no presence of

overburden. The weight of shell present in vibracore 1111 ( Table 5) and

the corresponding densi ty ( Table 8) when compared wi th other cores was

much lower for the entire core length. The reduced amount of shell and

increased amount of mud may account for the seismic record at core site 11

25

on track 1. Another possibility is that the overburden on the seismic

record varies rapidly over a short distance and therefore the distance

between vibracore #11 and track

stratigraphic column being recorded.

could account for a different

Track line 2 bisected the r1an 0 'War Shoal. The entire length of

track line 2 indicates a strong reflector at the surface of the bottom.

This was interpreted to be a densely packed layer of shell with a gray mud

matrix. The analysis of vibracore 1t3, located approximately 760 yards

from LORAN fix mark 5 towards the end of the track line (Figure 6) , showed

that the first 28.5 feet of the core was densely packed shell with gray

mud. The reflector present at the surface of the bottom would appear to

indicate the top of the densely packed layer of shell.

Track line 3 borders the southern edge and passes through the eastern

section of the Man O 'War Shoal priority area. The seismic record is

similar to that of track line 1 (Figure 7) . There is a strong reflector

(shell) varying from 1 to 6 feet below the surface of the bottom except

when the track line passes over the shoal area on the eastern end (between

LORAN fix marks 3 and 4) . Here, the strong reflector is present at the

surface of the bottom indicating shell present at the water-sediment

interface. Unfortunately, no vibracore was taken in the vicinity of track

line 3 to substantiate the interpretation of the seismic record.

Calculations based on the core data indicated there are an estimated

5,667,338 cub i c yards (94,455,625 Maryland bushels) of shell wi thin an

area of approximately 2,156,825 square yards (Figure 4, Appendix C, Table

9) . This yields an average of about 2.6 cubic yards (44 bushels) of shell

for each square yard of subsurface material dredged to the bottom of the

shell bearing layer. These estimates may be conservative for four

26

reasons: (1) The seismic records indicate shell is present outside of the

priority area, (2) No vibracores were taken in the eastern section of the

priority area and therefore omitted from the calculation of shell, (3)

Vibracore #20 contained very dense shell but was impeded from penetrating

the bottom further due to either the density of shell or an obstruction

and (4) The digitization of the core data resulted in an error of

approximately -1.8% or a total of 1,700,201 bushels (102,012 cubic yards)

under an area of 39,325 square yards.

Sixfoot Knoll

There were five sUbbottom seismic reconnaissance profiles performed

in the vicinity of Sixfoot Knoll. Only sections of the first four were

within the designated area of the study ( Figure 3) . The seismic records

revealed the possibility of shell being present at various depths below

the water-sediment interface. A section of the seismic record along track

line 1, typical of the Sixfoot Knoll area, indicates suspected shell at

the water-sediment interface (oyster bar, possibly living) and under three

feet of overburden (Figure 8). The inference of shell in this area is

drawn from the interpretation of similar seismic records obtained in the

Man 0 'War Shoal area with vibracores in proximity to the track lines.

Interpretation of the seismic records suggests that shell may be present

throughout the deSignated Sixfoot Knoll area. Vertical extent of the

shell resource could not be determined from the seismic records.

No calculations estimating the density and quantity of shell could be

computed for the Sixfoot Knoll area. However, suspected shell was present

throughout the entire area or approximately 2,577,300 square yards.

27

FIGURE 8. SECTION FROM SEISMIC RECORD ALONG TRACK LINE 1 AT SIXFOOT KNOLL (BETWEEN LORAN FIX MARKS 1-1 AND 1-2) .

28

.­w W I.L.

GRAY SILTY CLAY OVERBURDEN

WEST SUSPECTED SHELL SUSPECTED OYSTER BAR ( living)

OUTGOING SIGNAL WATER SURFACE WATER SEDIMENT INTERFACE

o

30

6o rE_1IMN

90 ..-

I ..-

NAVIGATION FIX MARK

o 100 200 300 YAROS

MULTIPLE

N I ..-

EAST

10/6/87

Area 8

No seismic records were available from this area. Therefore, no

estimation of areal extent of suspected shell could be made.

The one core taken in this area indicated a shell bearing section

with a four foot gray mud overburden (Appendix 8, Table 3) . However, the

analysis of this core indicated an amount of shell beginning at the

water-sediment interface (Appendix 8, Table 4) . The description of the

core is interpreted as being cursory. The low amount of shell present in

the 14-19 foot core section possibly indicates a time when the area was

uncolonized.

Digitization of Area 8 indicates there is 2,404,875 square yards of

bottom (Appendix C, Table 9) . At core location #1 there are 48 bushels of

shell per square yard of bottom to the bottom of the shell bearing layer.

If this core is representative of the amount of shell within the area then

a resource similar to that present at Man Q'War Shoal could be expected.

However, without more intensive coring the occurrence and density of shell

cannot be estimated.

CONCLUSIONS

8ased on the available data estimations show approximately 7.56x106

bushels of shell in the Sevenfoot Knoll area and 94.5x106 bushels of shell

in the Man Q'War Shoal area. Sixfoot Knoll contains shell but the density

could not be determined from the seismic records. Area 8 contained shell

as determined from analysis of one core taken in the area. The one core

taken in Area 8, however, could not be expanded to encompass the entire

area. Therefore, only the local density was determined at 48 bushels of

30

Shell per square yard of subbottom disturbed to the bottom of the shell

bearing layer. The actual densi ty of shell in any particular area may

only be known after dredging has commenced.

31

REFERENCES

Halka, Jeffrey P., 1987, LORAN-C Calibration in Chesapeake Bay: Maryland

Geological Survey, Report of Investigations No. 47, 34 pp.

Hobbs, Carl H. III, 1987, Occurrence and Distribution of Shell in the

vicinity of Parker's Rock, Pocomoke Sound, unpublished report to the

Virginia Marine Resources Commission, 17 p.

Langenfelder, C.J., 1988, Telephone conversations on dredging operations

in Chesapeake Bay.

32

APPENDIX A

SEISMIC SUB BOTTOM DATA

33

TABLE 1. CORRECTED TRACK LINE FIX MARKS FOR SEISMIC SUBBOTTOM PROFILES IN VICINITY OF MAN O'WAR SHOAL

UNCORRECTED CORRECTED BOAT LORAN LATITUDE LONGITUDE LATITUDE LONGITUDE

TD-X TD-Y DEG MINUTES DEG MINUTES DEG MINUTES DEG MINUTES

SOL 1 W-+E 27630.00 42862.00 39 11.3184 76 22.7888 39 11.3532 76 23.1102

27627.00 42862.00 39 11.2830 76 22.1915 39 11.319 1 76 22.5124 27624.00 42862.00 39 1 1 .2482 76 21.5955 39 11 .2850 76 21.9159 27621 .00 42862.00 39 1 1.2134 76 20.9999 39 1 1 .2511 76 21.3199 27618.00 42862�00 39 11.1788 76 20.4053 39 11.2 173 76 20.7253

EOL 1 27615.00 42862.00 39 1 1 • 1 440 76 19.8 116 39 11.1841 76 20.13 11 SOL 2

E-+W 276 15.00 42860.00 39 10.9856 76 19.9269 39 11 .0252 76 20.2464 276 18.00 42860.00 39 1 1.0204 76 20.5206 39 1 1.0591 76 20.8406 27621.00 42860.00 39 11.0552 76 21.1 157 39 11.0930 76 21.4362 27624.00 42860.00 39 11.0905 76 21.7113 39 11.1269 76 22.0322 27627.00 42860.00 39 11 � 1 255 76 22.3077 39 11.1612 76 22.6291

EOL 2 27630.00 42860.00 39 11.1610 76 22.9051 39 11.1953 76 23.2269 SOL 3 W-+E 27630.00 42858.00 39 1 1.0030 76 23.0219 39 11.0374 76 23.3437

27626.60 42858.00 39 10.9625 76 22.3448 39 10.9985 76 22.6657 27624.00 42858.00 39 10.9323 76 21.8271 39 10.9689 76 22.1484 2762 1.00 42858.00 39 10.8973 76 2 1.23 1 1 39 10.9346 76 21.5520 27618.00 42858.00 39 10.8623 76 20.6360 39 10.9010 76 20.9564

EOL 3 276 15.00 42858.00 39 10.8277 76 20.0418 39 10.8671 76 20.3618 SOL 4 E-+W 27615.00 42856.00 39 10.6698 76 20.1572 39 10.7089 76 20.4776

27618.00 42856.00 39 10.7043 76 20.7518 39 10.7428 76 21.0722 27621.00 42856.00 39 10.7394 76 21 .3469 39 10.7764 76 21 .6682 27624.00 42856.00 39 10.7744 76 2 1.9434 39 10.8108 76 22.2647 27627.00 42856.00 39 10.8099 76 22.5403 39 10�8451 76 22.8621

EOL 4 27630.00 42856.00 39 10.845 1 76 23.1386 39 10.8799 76 23.4604 SOL 5 W-+E 27630.00 42854.00 39 10.6874 76 23.2553 39 10.7220 76 23.5771

27627.00 42854.00 39 10.65 19 76 22.6570 39 10.6872 76 22.9784 27624�00 42854.00 39 10.6165 76 22�0592 39 10.6531 76 22.3810 27621.00 42854.00 39 10.5812 76 2 1.4627 39 10.6185 76 21.7841 27618�00 42854.00 39 10.5462 76 20.8667 39 10�5842 76 21.1880

EOL 5 27615.00 42854.00 39 10.5114 76 20.272 1 39 10.5505 76 20.5930

Key

SOL - Start of line

EOL - End of line

W - West

E - East

34

TABLE 2. CORRECTED TRACK LINE FIX MARKS FOR SEISMIC SUBBOTTOM PROFILES IN

VICINITY OF SIXFOOT KNOLL.

UNCORRECTED CORRECTED

BOAT LORAN LATITUDE LONGITUDE LATITUDE LONGITUDE TD-X TD-Y DEG MINUTES DEG MINUTES DEG MINUTES DEG MINUTES

SOL 1 W-+E 27619.00 42830.00 39 8.6627 76 22.4510 39 8.6993 76 22.7760

276 16.00 42830.00 39 8.6266 76 2 1.8523 39 8.664 1 76 22.1768 276 13.00 42830.00 39 8.5911 76 21 .2549 39 8.6295 76 21.5790

EOL 1 276 10.00 42830.00 39 8.5554 76 20.6584 39 8.5947 76 20.9821 SOL 2 E-+W 276 10.00 42827.00 39 8.3 183 76 20.8301 39 8.3572 76 21.1546

27613.00 42827.00 39 8.3544 76 2 1.4270 39 8.3924 76 21.7520 276 16.00 42827.00 39 8.3901 76 22.0253 39 8;4274 76 22.3503

EOL 2 27618.00 42827.00 39 8.4142 76 22.4245 39 8.4503 76 22.7499 SOL 3 W-+E 27618.00 42825.00 39 8.2565 76 22.5398 39 8.2926 76 22.8653

27615.00 42825.00 39 8.220 1 76 2 1.94 11 39 8.2576 76 22.2661 27612.00 42825.00 39 8. 1841 76 2 1.3432 39 8.2226 76 21.6678

EOL 3 27610.00 42825.00 39 8. 1606 76 20.9445 39 8.1992 76 2 1�2691 SOL 4 E-+W 276 10.00 42823.00 39 8.0022 76 21 r0590 39 8.0411 76 21.3840

27612.00 42823.00 39 8.0262 76 2 1.4572 39 8.0649 76 2 1.7827 276 15.00 42823;00 39 8;0624 76 22.0560 39 8.0999 76 22.38 14

EOL 4 276 17.00 42823.00 39 8.0864 76 22.4551 39 8. 1232 76 22.7815

SOL 5 W-+E 276 17.00 42820.00 39 7.8497 76 22.6282 39 7.8864 76 22.9546

276 15.00 42820.00 39 7.8255 76 22.2285 39 7.8630 76 22.5545

EOL 5 276 12;00 42820.00 39 7;7895 76 2 1;6293 39 7.8275 76 21.9557

Key

SOL - Start of line

EOL - End of line

W - West

E - East

35

APPENDIX B

VIBRACORE DATA

36

TABLE 3. CORE LOGS RECORDED BY THE EXMAR COMPANY OF NORFOLK, VIRGINIA.

37

VIBRATORY CORE SAi/.PLE LOG � X "'. ;"R VIRGINIA . ..BEACH . VA-- _ . - - - .

�

D 1 :. en"".: : /vLk f)�, .... 1 - aI--f ,U � - � � ..,l.tvU--�

Ie � :: � : n -: ; 0 n

SoF-T �V

SII-T

�eL.L u./"AAV

O�T)"th

./ � " \

J'+ - .. .

O I 2 4 6 I 8 10 12

�ime for Penetrat:on Real ';:"ansed' PeT' -f'-�- . I - - - "'" •

I I

I I I I I

Locationr ('!fi fl./J_A 41�/Vk �J.A / I � u Su"Oport Vessell � ic-tA..-Positioning l"ethods L� C!-Positioning Informationr

i..a:r .31 0 {'}1.� , L� J�7 (7 ;;2i I

Depth of V/ater I /0' Est.Currents Winds Sear Swelll ,

I Length of Barrel t �O' Diam.Corer �.O ." &/I..T \ 14 I Depth of Penetrations 3tL-' Length Recovered 1"2k·� " /2 � V1--l t,q.f,�

7! i6/ I I lsI I ,

CoA�E 'l 20 I wu. Tfii / 221 1 Stil1tp C'oA II-�Ii � 24 I

6A./JWN 26 I I .5MJ> " .nl 30 �'2 I 34 36 38 I I I 40 I

Remarkss R�� To )...DI �_ ��t"J -J� �z-' ,� ('(')�� ':!::.� •

)Jo } Cl '>� 1;P --,c So _� L -f-L.-vD �..L'11L- c::;t;;Lr dV � L--z O'-t- 'Y\.L C' 0 LI-� � � ";. a b &t L (, J � jv loco> r. o-r ��.L of I;� Us,", f--t I-I:;;'X*) st'--L±- ) a l-f.o!'1r

Operator I

/ U

jItI) L OlL Client Reps ��M Length Retainedl�,L-.�cd�, Shipped TOI 711ft.. Type Analysis.

/

o �-fu:,.,.

Bit Sarr.ple & Qrji tiofBc l tJ I (' , I' (' eo/ <2 /" � Date: 14 Mth1'�ge Timer //<1-0

\ 1\ _. I '} 1 . c � IS�te # �V�IJ?Mn,-�.,(-. /) . )

c

D

VIBRATORY CORE SAit1PLE LOG

1:' y.;.'}. R VIRGINIA . .BEACH. VA - - - . -l ; en": : JY1/�' )),..3.--. �ft..2.� . �c..,'l)WY�-L � e sc::: D-:�on i \1>enth

... � - .. -

0 SoFT

/j :! GAAV

SI L. 'T / 4 6 I

\ 13 S�E\...'- 10 tA.J / (,.AA'I

\ 12

S.'L-T 14 16/

\ lSI

\ 20 I 22 24

CoAILSE: � 26 �D 21

'/ 30

�'2 34 I 36 I �8 I 40 I

Time for Pene��ation Real

I i I 1 I

I

... , d' p J"+ .r. ... apse i - er _ v .

I I

I ! I

t I

Bi -:: Sarr.p2.e & condi .. t)01: 1;1 (' a (' 4!........ c- oo:..c

Locations CN/J.-ddt///./-t- � I Su�port Vessell 'Bur J.�(I

V)tI�e. Positioning Method. Positioning Information:

u,r 1-&7

a.�O.�t." � 14: 4 .:L J.j, 2

/ )

Depth of V/ater I e.� Winds Seal

�st.Cur�entl

Swelll

I Length of Barrell '1:.0 I Diam.Corel �.O " Depth of Penetration I 3S:' Length Recovered r 3/-0 Remarks I

I

I

Operator I Ai< � Client Rep. ��� Ow-ri; .... I

Length Retained. 15/-0 Shipped To I jntf �4..f!.. kwey Type Analysisl

Date: Time I If i'VJ�h �a l � tJ t!) i ; 1 5i te # �£.(� roPe-\- kw#tl1h- Core 1/ .jeff) DC;. �I 26 0 ;21,�

I

VIBRATORY CORE SAit1PLE LOG

�Xi'·.A � VI RGINIA ..BEACH, VA-.-

:1 j ent : J-'/o\ . i 1� . , <f }J c,;X. j2, c; .. '"vti-� )o<;c:� n�ion �

Deuth Time for Penetration ft. Real Elapsed Per ft.

0 SO,:., V' 2 �" II 4 &''-T 6

\ s

5*1 eLL 10 I

\ tJ/C,AAY 12

�'-T 14 I \ 16 I

lSi

\ 20

\ 22 24

� 26

coARS" 2"8 )0

SA�J) I �'2

I; 34 36 .is I 40 t

Sit Sample & Conditionr

Locationl t�tJ-��k ;&./01' Su�port Vessel. � � (! Positioning Methods C11cVl-a'?'V e Positioning Informations

Lat ,Jq CJ (}1, & /

4?tJ 24�() �1o �

Depth of Vlater. )0 ( Est . Current s Wind. Seal Swell.

I Length of Barrels Diam.Coret �.O H 1..(2' Depth of Penetrations �(2' Length Recoveredr � · S 51 Remarksr

Operator I EllcCf42.,.- Client Rep, "6 v�, o�H�&'\. b -I Length Retainedl � ,�

Shipped To I }11.IL M� �� Type Analysis I

i Date: / if If'krrh.'$3 , Timer /5'55 , 1 Site II � �tkl.{"q .#-3 Core # 31 0 (/t. (.; I 710 v�. 0 f

a �

VIBRATORY CORE SAiJIPLE LOG �Xil.AR VIRGINIA: .BEACH, VA--i en� f ;v1� ,})ak· �O��4� SC:-�D�'on

�'F-r (5;AAV SI L..,-

c:.��L.L. t1fi.AAV

511-\,

SR.O""�AT PE CoAJl.,Se

8RD""tJ SMD

DeT)th

If/ \

\ \

\ \

///J �" � -

f"� - .. .

0 2 4 6 S. 10 12 141 16 I lsi 20 22 24 2� 21 30 3'2 34 I 36 �8 I 40 J

Time for Penetration Real Elapseci Per ft.

I

I I

I I

I I I I I I I

I

Locationl !!�/J"/LA;lv?J'!.U �1 SU1)1)ort Vessel. ' � Lc-i .... Po�itioning lw1ethod. 'Ltn..4� G Positioning Information,

ktt;r 3el � 01 . ss-I � 7� t) 2 tI. f) / ,-Depth of �/ater I // / Est.Current, Wind: Seal Swell,

! Length of Barrel r �O/ "3 1/ Diam. Co:-e I • 0 Depth of Penetration I �Z' !.ength Recove:-ed ,'3/. 7 Remarks I

Operator! I�L��� I

Client Rep I � j� () ltfL Length Retained. 3/·7 Shipped Tor /n�. �� 41vu<evZ 7 . Type Analysis.

Bi --:: Sarr:'D�e & Condi ti0I;:f . c�tc r:i::: c l�*, Date: t.l!. jl1�� 1{g� " . Time, /��c;-�- - - !Site # Sv�&etk�.Jlty . Core # 31°01.55' 76°;2J../,O,J

VIBRATORY CORE SAMPLE LOG EXMAR VIRGIN A: .BEACH , YA- , "

� J\. o-..fN J\ � � D Ily-Ctl.� 'Cl ient t .M o\} \ \J

Desc!"intion Denth Time for Penetration ft. Real Elapsed Per ft.

0

�MY � 2 SH .. I / 4

6

\ Q 10

�\-tkh'" \ 12

WIG-PAV 14

\ 16 SILT 18 20

\ 22

\ 24 26

CoAIlSE." 'l 2"8 S�AJ 30

SA.al> / 32 ,. 34

36 �8 I I 40 ,

Bit Sample & cond ttiol ' Cl- OM

Locationl C'lcs. ��vf SUT;>port Vessels f.3;r4/ � Positioning Methods ?I Positioning Information I

L <5'V'� C 7-:-7 (P�O,l y'1- �59,3>

L��c. L.�. L'k.,j .

�gD /'= �

Depth of \'Iater1 Est.Currentt

r )),l.-,v -:2.S .3,cuj

Wind: Seas Swells

Length of Barrell Lf tJ I Diam.Corel �.O II

Depth of Penetration. '31-' Length Recovered r 3/·� Remarks.

Operators t�(�� Client Repi 'tJ( ode

Length Retained s �/, S ' � Shipped Tor �1¢>3'f

, Type Analysisr

Timer Date: 7-1 4�h'cn CJ9.IO� i l Si te # JV1a11 &'tJa-vS1� I Core # ________ __________ __

I

VIBRATORY CORE SAMPLE LOG EXMAR VIRG

tel ient I MJ.� , Descri 'Otion

��AV .sILT

�i.LLS w/'-VAY

�'LT

�=., �Al)t>

ti� .BEACH I �A-LW . o'f )j aA . �.-&�)I'l Vi1 It. �

Denth Time for Penetration ft. Real Elapsed Per ft.

0

/; � 4 6

\ e 10

\ 12 14

\ i6 18

\ 20 22

\ 24 2�

� 2. 30 I �2 34 36 �81 40 I

Bit Sample & conditi� (lIG

Locationl (' k_co oD<41 SU'ODort Vessell � L� Po�itioning Methods Positioning Information:

h�C "1-7 b'2-@, b l/1- SS-£!.'2-

Depth of Viater. Wind: Seal

LcYv�C

�:!2f:. 'S � )1·1 A1 L"vg , "1b � '"J-3·/W

Est.Currentl Swell.

Length of Barrell 4DI Diam.Core. '3. (J'" Depth of Penetration. 3�' Length RecoveredJ�d.� Remarks .

Operator I 1-<4 t � Client Rep, "&�y�� Length Retained. 30· 'L-

yY/t(. �'cd �u� Shipped TOI

Type Analysis.

Date: U If,,(� �; �� Timet j olD • . j Site # ffMt C 'r{lv/�L,�Ff :2. Core # ---------------------

I

EXMA R VI RGI1HaA� .Il �CH , VA;. VIBRATORY CORE SAMPLE LOG

.C' ient I /VJj. ikn . �� LJ �. �,!..dl Vc)'"'.!. � � Location I C' �� \ � Descr; . . otion �euth Time for Penetration Su�port vessela __ ...:I4i4r.::: ·;F-"':"'�""':'- "";;;"'/ _________ _ _ ft. Real Elapsedl Per ft. P ' t' . M th d tr L /'I OSlo l.onl.ng e 0 a __ ......::;;;:.;fN'���_'-______ __ _ _

o Positioning Informationz ____ ____ __ __ _

2 L,)o q.,.,c. . '1-7 , G '1-� . � � ai. � 9 (7 / I • �IJ / 4

L/'1-. 1259· b �();vr3' 7 1/:1 ?-�. )u.J S�tk� �6 �--4_ __ -+ __ --�----------------------------------UJ/GflA'I / 8

Depth of \'latera Est.Current.

ca., L T 10 Wind I Sea 1 Swell. / 12 Length of Barrel. 'to � Diam .Core I '3 - 0 1/

14 Depth of Penetrationr :?b I Length Recovered .3ff'1 i6 Remarks.

/ 18 ----------------------------

20 22

/ 24 2�

��;A�QI'C�\' : Operator. pt1k� Client Rep. 'g,A.( oL ��� � n I SaLT IZ 34 Length Retaine�'( , 9

� (!()1't� /" 36 Shipped To.--'-m-.:.'d�....;...·.:.....;�::!i:;;l'��tJu:.� ·�d�..::::-..=...::::::::..:::::::�l------:sAiOI> � 8 I I /I 40 J Type Analysis • __________ ____________ _

Bit Samnle & Condition' -----�--*T'"""'T-. =-:------------------C I (pwl , Date: 7-1 rt1(W¥C1 '�� Time. II (J S-1 Site #t1M1 O'IUt1V344J -;l3 Core # ______ _

I

VIBRATORY CORE SAMPLE LOG EXMAR VIRGIb

Client .-.A? ). - .

Desc!"i'Dtion

SH� -wj�A"

�'LT

t;,MV �, LT'/

CLAY

�A: �EACH I VA- • -

) -�r�" JJiA. f,& �� L(V�L> IU Deuth Time for Penetration ft. Real Elapsed Per ft.

0 �

/ 4

I 6 e 10

/ 12

I 14 16

I 18 20 22

/ 24 / 2-6

Z8

� 30 32 '\

I!o",� t\ fJ> 17/ 34 36 .i8 I 40 J

Bit Sample & Conditions t! I t!!J '"H J

Locationl C��. :g� SU'D'Dort Vessell � Ltn<..! Positioning Methodl ��a..".. � Positioning Information:

l��{} -z-1 .&?-9.L L�, ��f' 1t.,3N l/1- tfbO,t.) L.�I .7/2° "'"J-7... '7 B u.J

Depth of Water. Est.Currentl Wind: Sear Swell.

Length of Barrell t:J. 0 ' �.(!)., Diam.Corer Depth of Penetration. �q i Length Recovered. �S.! !I' Remarksr

Operatorr ;11L,(}l� Client Rep. \>"JA�£ Length Retained. 3 S". 8' 221ri�{�7 Shipped TOI

Type Analysis.

Da te : "2-1 dif �Ct 'B� Timer /1 �O !Site #MMf�/��4;JtljL/ Core # _______ _

EXMAR VIRGINI,!.: .BPCH I "A-VIBRATORY CORE SAMPLE LOG

Client s A1J,.. tlJc· o-FPI:J::,,_ ��o\.{y-�� Locations C k�. 1Zv� ... Description I UOenth Time for Penetration Su�port vessels __ �tt&��'g�_i-�� ____ / __________________ ___ 1 ft. Real IElapsed l Per ft. P ' t' . M th d I L ......, � ____ � ____ � __ ___ +-I ______ � os� �on�ng e 0 s ____ �������� ________________ __

Positioning Informationl ____ __ __________ ________ -----

l� c. '2-7, b27.'1 L.....�.�q" J ) ,2'/J '-1'2-'_ e 15"1. � ��V1Q' '7 (/' -:l-Z , � S'CU

-;,.J

Depth of Water. Est. Currents �--�----+-------�------�I Wind: Seas Swellt ________ __

1--4---+-----+-----11 Length of Barrels 4()1 Diam.Coret '!t.DN � � I I Depth of Penetrations :3 b I Length Recovered. �Z..7' - i I Remarks 1 _________________________________ ____ ___

1-1 ......::.-,:.-+-1----

-+----+-----11 Operators tNll�u-- Client Rep. D"t{ OL

:- : I Length Retained I :; � _'

--4-----;.-----l1 Shipped Tot n1d. �g/� �

I . . T �

. Date I '2.-/ AI( �4 .• A,"�� Time I I 3 IS-_______ --IL"..J.,..Q9'�o ::!! ..... 1-_ ___ _ 11 Site #��/LU���:Jit S- Core #

VIBRATORY CORE SAMPLE LOG EXMAR VIRGINIA .BEACH. VA-- - "

Cl ient f �J.. .. f)� ,,,o::p m t �9- OLty�!. Desc!'i 'Otion '6euth Time for Penetration

ft. Real Elapsed Per ft.

O 2

/ 4 6

/ �

51-1 £ L.\.. 10 12 LfGRAV 14 C;aLT

/ i6 18 20

/ 22 24 2�

/ n 30

WH \Tfl\"'t> 7;' �'2

(!"A-�E AJ � 34 SAoul 36 SAN.,.

�8 I 40 I

Bi t Sample & CO�d�t;::t

Locations C' ��.�� Su�port Vessel. i3d:1 Lh<--Positioning Method. 1-�� C-Positioning Information:

I bc�C 7-7 ',1.9 l-.'� 3qe 'I·�N '-IZ 95f .. � 4....,. 76 7=-

1,'1CI Depth of "later. Est.Currents Wind. Sea. Swell.

Length of Barrel: 4{)1 Diam.Core. "3.t) ., Depth of Penetration. 36' Length Recovered. '3S'"., Remarks I

Operator. tA1lvdlLL. Client Rep, ��'{,{ O"'�

-- D I Length Retained I '3, � •

Shipped To. m,i ffitCoF'-�

Type Analysis.

Date: 2::1 M�C; '8� Time. /�Jc.;-1 Site #/�a.-vr D'tUav.->�mJt 6 Core # _______ _

I

VIBRATORY CORE SAMPLE LOG EXMAR VIRGINIA .BEACH. VA

C' ient I h1 �r '1 J .... J-. »�, tl1.-$t9l.i y"U�

Descri ution \d Denth Time for Penetration ft. Real

"B�� 0

�/ . , :"- �

\ 4 6 8 :!t��l..'- \ 10 WlfrP-AY 12 �ILT

\ 14 16 18

\ 20 22

\ 24 2�

\ 21 30

�olflUS' 1/_ �2 &lUuN 34 &4A11> 36

�81 40 ,

Eit Samnle & Condition, -c lr;.;;}

Elapsed Per ft.

Locations L L..a�.�� SuuDort Vessell � Ltnl, positioning Methods LeY�t2.. Positioning Informations

L�c. "'-7 ';8. .. l b�' �g. /1.- -Z!,() 951·, Lt!lkcl . ¥2.. 0 7'- Y. .. 8W

Depth of \'/ater. Est.Currentl \'lind, Seal Swelll

Length of Barrels 71.0' Diam.Cores � ./J .�

Depth of Penetration. �1 ' Length Recovered ."3B .. S" Remarks.

Operatorl 141 "'-� Client Rep. 1G J{ �jh.-,

Length Retained. ��.�I Shipped To. w1l.- �7iUtJ? � Type Analysisl

Date: 'Z-L���r�� I Times I" . "S fJ tJ 1 Site #�4II;t �/uJA--�I;J·. 7 Core # ___ ____ _

I

VIBRATORY CORE SAiJIPLE LOG �A"'J\ rt y .L..fi ......... Aol.;,..p:, ..-yr-.-.-..... , ........ -- •

C' ient t 7Chf ��. 1 cf-i..JiA . ��"&.-i�> . Desc!,i ution 'deT.>th Time for Penet�ation

ft. Real Elapsed\Per ft.

0 2

/ 4 I 6 I

�HetJ.. Q I ,.Jf r;JtAV f lO I

12 SILT 14

I i6 I I 18 I 20

( 22 24

/ 2ii � 30 I �2 I I I

eoAN£. -�

34 t SRoal#ll 361 I BAND �8 I I I 40 I

Location I Ck� �� Su�port Vessels BII! L(HA. Positioning Methods L-�c-Positioning Information:

Lrrr:5V\C- 'Z-7 , 1-7·7 L-.v+ 3'i4 u .7...$'P t.f 7- 8' f) a() b5;' 7(,. � '2..1--" 7'W

Depth of \'later. Est.Currents Wind: Sea.

, Length of Barrel. L.( �' Depth of Penetration. � - ,

Remarks I

Swells

Diam.Corel '3 .061 S-.8/ Length Recovereds!)�.f

Operators M'-ct.· L Client Reps R. (,,,,11 )YYl9fA1:S"r Length Retained. '"3 s: 8 '

J Shipped To I C I !:::l I �

Type Analysis.

--:J. ����

Bit Sample & Conditiont. , 0-- I Q'?d-:-tJ I Date: kk JV1ibJ11'ml 1 Site # J-v\�dwrol/J � a

� ime I eJ C1 ")" Core # --------------------

VIBRATORY CORE SAiv'lPLE LOG ErAAR VIRGINIA. ..BEACH. VA--- . ,..

C' ien"t t fo1 J � -�. o-P iJJ\, � � (J�Y'� De sc'!' i u"t ion � Deoth Time for Pene�ration

ft. Real ElapsedlPer ft.

0 I �

� 4 I 6 � I 10 i ;t--.atLL 12 tfJ/ G-P.AV ( 14

SI LT i61 I I

/ lsi 20 I

( 22 24 2� I 21 PAR.kSo.L.. 30 .....

coA� � 32 I 34 I t "8�p

"

36 �81 I I 40 J

Bi t Sample & Condi t;r�J

Location: �k�,� SU"9port Vessel' 8,� Lou.. Positioning Methods 10 �C-Positioning Information:

� c LeA· I/f I 'AJ 2-7 47.L .. , 34f41 1.f7- BS1· D �. 7 /:,0 '2:"2. ·PUJ U,)

Depth of Vlater s Est�Currentl I Wind: Seal Swells

I Length of Barrell =to ' Diam.Corel � .t!J " Depth of Penetration I 3�1 1... Length Recovered s33 • � Remarks I

Operator I p1 L� Client Reps R ,(0�bw-��� , L0\1.

Length Retained. 53· L. ...:+ Shipped To r C' .' ;�t Type Analysis.

Date: �1..--A� �'�· If\' _!.mel

G s�,� -::. ='

t..S--Z-O 1 Site �CJ�L..;.;t!1 Core # _____ _ _

VIBRATORY CORE SAi/.PLE LOG

En-.AR VIRGIli� �EACH, Y-A--C' ient r JU � 1 ·O,,�.;f- 1.Jc9t. � � "V\.,...tL� Desc�i 'D"tion l'-l Deuth Time for Penetrat�on

ft. Real

0 �

\ 4 I 6

SJ.l��L e 10 J,V' / GrAA 'f \ 12 S/l-T 14

� i6 1 la 2Q

\ 22 24 2�

� �2'8 30

�2 I 34 36 I aDAIlS� VO jal 6P.�'J> 40 J

Bi� Sam'Ole & Conditionr -C- '6;::/

ElapsedlPer ft.

I

I I

I I I

I I I

Locationr C�� � Su�port Vessel r B, � Lo fA. Positioning Method s L�c Positioning Information:

L�C. 2::.2 �2.�2 L#t: '3 2- ll·�/AJ 1/7- eS",� 7 Leffj ' 74· -z.� .9'1(/

Depth of Vlater t Est.Currentr \'lind: Sea l Swelll

':f. f)f 3-0 Length of Barrels Diam.Cores Depth of Penetration. 'i. () I Length Recovered .36.-8 I Remarks.

Operator r }'Uk. Ol6.L-client Rep. {;.. .cJ��): ;:::JYI, Length Retained.S fa ,�I Shipped To r a. wf I � ) 0) - . Type Analysis.

7 9!fd 1-1-�

Da te: 2- '2- M CJ;Vt t I @)� Timer LQ6S-• 1 S ite #� ()IW�$t..tJ4rJl.-l{Jcore # ______ _

VIBRATORY CORE SAil.PLE LOG

'::'kl"ll'\n .,��,,-----: "-"1.' ----r �--

C' ient: MA. 1J tdt.. .. �..s�(,{ yt� Locations C �� · �..., Desc�';'D�ion

' De'Oth Time for Penetration Su,?port vessel ' _ _ .Ji:B�,�t:::I--.:::::J!;.::;D..:::U.� _ __ _ _ __ _ _ _

ft. Real Elansed l Per ft. P 't'

, M th d � .L----4---!-.....;.;....--+-------� os� �on�ng e 0 l _.....a:::;;���'--...;;;;;;.. __ __________ _

o I I Positioning Information: _____ ________ _ _ _

;Z Lt"�a-c 27· ,1=4.'3> Lt· 31" ".�' AJ

\ 4 '1-7.' QM.2. L�.. 7 '" 2.."2-·3$',,",

S \...1& \.1- : Depth of V/ater I Est. Current I

wI t;.AA'( 10 , Wind: Sea. Swell 1 ____ _

� I '",- \ 12 , Length of Barrel. Lf a I Diant . Core . �. Q It 14 Depth of Penetration. -Sq I Length Recovered,-S/,D \ 16 I I Remarks: ___ �-------------�--------lsi I l? �d�d- -; � �t- �. (J "" 4.-vl./ J v...D-- ) (p � .... \ 20 I fJI f �t9� �_�.!:l 10 .... / -hll'l v ... .r.;J 22 _ � ��j;-� , I �

24 1:) -----------------------------------

CDAtuae / �2_-6 ..I..-...-...;-------+-----i ===========================::;::===:::;:======

I

1!>�A1 / / 2"8 S A,.I,P Y 30 I Operator r 11 h � Client Rep. � . Ctv"i\ � � ��.

�2 I I 34 I I Length Retained. 3t· � � ,== L 36 Shipped To I C � 1 � � su l.oVt.�G is I I I 401 Type Analysis . ____ _ __________ ___ ___ __

Bit S�ple & Conditions � _____ �_�.I ��----------------� -0 )..yl i Date: 7:-2-JI!1<1'ttLt es Timer 11-'2.-� 1 Site # M PNl ot W...,c£---;;;r=t../! Core # _ _____ _ _

VIBRATORY CORE SAMPLE LOG �.h.I"lJ"\.n. . .. . �Y'.��: ..... -._ ... , ..... _-- •

C' ient I .xAo\. i� �Q)'f )Jilt..- 4);�OI.l�" Desc!"'i 'O�ion

UDeuth Time for Penetrat�on

ft. Real Elapsedl Per ft.

0 � I

\ 4 6 I I

SHE: LL e I 10 I w/ c,.p.A� \ 12 $'Lr 14

\ 161 I lsi I

\ 20 22 24

\ 2-6 28 30

� 32 I

CoAPSE 34 I t &IlDWN 'j 36 I j SANP i81 I I 40 J I

:Bit Sample & Conditions l c/ Q-b

Locations [7 k-:.. ,�-Sut)'Oort Vessell �I� L'o� Positioning Methods l ... t9-'V-a..., C. Positioning Information:

L�'r-fWt � 2-7 '-z.,s=o 7 L ak- -SqC' )1,Ob� 4l'2.. 9sS-S La±:). 7 b f!? 2-"L.� '5' t<J

Depth of Waterl Est.Currents

Wind: Seal Swells

I Length of Barrel t '-I ()' Diam.Cores 3,-0 Depth of Penetration. 4(2' 37-" Length Recovered.il:z-' Remarks.

Operator. )AI\ �Cf.L.- Client Rep.R. ('�t�� 0}'". Length Retained.3 7 '� . ...;;t-;;-

.J Shipped To. c.. z " 7 �� , Type Analysis I

, Date: -Z--Z r1/lQ1ct C I 00 17-1 () Time I

1 Site #MQIAI1b\.dll+-�L;rJI4ore # ______ _

VIBRATORY CORE SAiV!PLE LOG

t;"XMAR VIRGINIA .BEACH. VA-_ ...... - - .. - , A C' ient t �1t"\. � ).LA 1; - M't AJil\.. lk. � C> 14 V' M-So Desc!'i '0-: ion �e1)th Time for Penetration

ft. Real ElapsedlPer ft.

o I I � I

) 4 I 6 I I �� w (;1l-AY 9 I

/ 10 SI L-r 12 14 I

� i6 I ! 18 20 22 24

G-�A\' V � 2�

Ca." 23

CDAP-Se ,J � 30 I S� �2 I SAItIP f.- 34 I

36 �8 1 I I 40 I

Bit Sample & condi;irn:q

Location s Ck",�� Support Vessels �'o, 7l-ou. Positioning Methods ov-�C Positioning Information:

L�VLtacC 7-7 &2-� . '"L lJ· �1� J) .2-IJ ttl.- �:> j 'D kv;:,. 7 bel 7-'Z..·£!tU

Depth of \'later I Est.Currents

\'lind: Seas Swells

I Length of Barrels <::i.. () , Diam .Core I 3 .. 0 '"

2a� I cr l Depth of Penetration, Leng-th Recovered,32. � Remarks.

Operator I J4l- � Client Rep.� . ���k1am� :-:J", ,

Length Retained I 3 2.. ' q I Shipped To r c;J "\Afp Type Analys is t

Date: �'1-- 1V1� tl'�� Time,

(, �jJ .

i /2-<-:>-S I Site #�� b'w,-�Lt.;t1;-l� Core # ______ _

VIBRATORY CORE SAiw1PLE LOG

.!:;k/flP.t{ v .J..L\,,,.J.. ... �: ""t� ....... , •. �

C' ient : 100\· � �. L. OS!!) Vl yU� Desc'!"i "Otion De'Oth Time for Penetration

ft. Real

0 �

� 90F'- 4

tnI-A'I 6 I SlL--ti( 8 CLAY / 10 12 14

sk-lEL.�

� i6

�Gp.AV 18 .11.-. 20 I 22 � C-tl�Jt5"

� 24 BRow'" 2fi SANJ) ! pi 30 �2 I 34 I '6 i8 40

Bi't Sanrole & Condi t\on r -�. �

Elapsed l Per ft.

I

I

I I

I I

I I

I I

Locations �k��� SUl)port Vessell Bl,fJ Lou Positioning Methods L2�C Positioning Information:

L,� c 2-7 b?di..·1 �J, �:z e1 I ) j.) V 4-z.. 957·8 L�. 7b� I "l--�./ tV

Depth of '{later I Est.Current.

Wind: Seal Swelll

, Length of Barrel s 4-e>1 Diam.Core. �-D Depth of Penetration. '::L. (!) ( -I Length Recovered. 2.9"$ Remarks.

�-� I" A J'+- <:- L � '" � �"y erl ""'-4..----1-"bt!> "V'4. /.7() o.,.A .I-:ry:�� � �/v-" , !!::. o�;-Q. K c-r-� u J ��r / / /

I_H,J

Operator I In b � Client Reps i2. Ca:t:��, ;

Length Retained ,7--9 ,S- / Shipped To I (?;5t ; J Q

Type Analysis I � .

by-:;��

Da t e : --z-""2-l!1 � r g> � �4f) I Timer 1 Site #!Y.fY1 (jW.�p)··\.()HILfcore # ______ _

'J'�I

VIBRATORY CORE SAir'IPLE LOG

EXMAR VIRGI1:f!,l\ .B�CH, VA-C' ient t Iv! tA . � �. CJ -r JJ iA· fYa S>o u V't1L> '...J Descr; p-:ion Deuth Time for Penetrat �on

ft. Real Elapsedl Per ft.

0 �

\ 4 6 S�&\...\.... e

1M�'l 10 S. a...r

\ 12 14 16 I 18

\ 20 22 24

\ 2� I 2"1

\ 30 �2

PAp.k SOIL .. ZZI2 34 A�P uJ"'P 36 i8 1 I 40 I

Bit sam1e_ \;[fdition, S� """'" I 0 �l I

I

r

I I I I I

Locationr CJk�.�� Su�port Vessell 8i � Loti... Positioning Methods � C. Positioning Information:

L�4Z1 {] 2:=7 b z.lf: � k� 3q� I ) J .'2-ll

t.ih 96" ·0 L-.�. 7 bl# '),.:1- . / I I.U

De,pth of \'later I Est.Currentl Wind: Seal Swelll

I Length of Barrel I y... CJ I Diam.Core. S ·0'1 Depth of Penetrations Sl C2 ( Length Recovered,�S'7 I

Remarks.

ope·rator.;11L� Client Reps �. Cu.-ftLi��J � �'Y' , Length Retained I �s· 7 '

� �� .. Cw! ;� Shipped TO I

Type Analys is t

Date: �'l- )tIf� C' g� _�imel l..l.f � D I 1 Site #fM�O't.Uw-c;�JR1Score # ______ _

C!.ien-: t !'

VIBRATORY CORE SAj�PLE LOG

.!..location: 0 \"4� . �� . fot � (J'LU:vv SLo Desc!"iu-:ion for Penet!"ation Su,?port Vessell gla Lou.. ..... , d' p �.... 1 '

S"-le.l.L wi (;p.A'{

SILT

coA�e s.f4.,vt>

.t._anse I - er .l .. . p ... . M +h d r ______ � ____ �---____________ � _os� .. �on�ng ew 0 : __ ������L--�� ________________ ___

o I I 2

\ 4 6 I \ 8 \ 10 \

\ 12 14 I 16\ I lsi I

\ 20 I 22 241 2�

\ 2"a I . 30 I

\ 32 I I //2, 34 i I

36 i �8 i I 40 t

I

I I !

I I I I I � I I I I

Positioning Information: ________ �-------------------

k-a- C 2-7 '�3·' �J:. 310 /)./�/Iv' �2. 'sri. 8 L�w;; · 7 C/' "1-2.·0 'V .::/

Depth of Waterl !st.Cur!"entl

Wind: Seal Swelll ------

�e!1gth of Barrel: '-If) , Diam .Core I '3 -0 � !)epth of Penetrationr �7' !.ength Recoveredr�S." Remarks: __________________ ______ ____________________ __

Ope!"ato!" I 1{.1 � ,4td- Client Repr E�x, --,.--.

�ength Retained r :; � ·b I J Shipped TOi (' v./T ; t,..1; b 9-L,:� C..J

�ype Ana:ysisl ______________________ ________________________ _

Condition: Bit Sample & I F i :Ja-:e -,

-;;l �t.f _,l, \ e� �:''''e I C' 8'f '> <!, c� <>:f,- � , " I /.L/ " ; 5:'-:e ;: tiw".�",c r. :o:-e J1

VIBRATORY CORE SAiJIPLE LOG

_ .... - - .... - - " r C' ient : Jtt1 t.� -\l: -I�' r.+!J�- ()k S (!) ILArL.-L � Locations c.�, �A�.J M &vi C7)LU�v-s�"-,,J .Jesc!"iDtion

���\-\..-. wi '-R.�'i .,LT

COA-II.S&� ���J>

\�enth Time for Penetrat�on BI� lolA / Su,?port Vessels

ft. Real Elapsed Per ft. Positioning Method:

Positioning Information: �C 0 Lg}· //./�-/�1 2 I l�L- 7-7 b'2-3.� ��b

\ 4 I 4'2 SSCi·' 1--�. -7,=" .;; , '7 /4..,1 6 I e I Depth of Vlater s Est.Currents

\ 10 Wind: Seas Swells

12 ! Length of Barrel: � (2' Diam.Cores '3 -0 u 14 I Depth of Penetrationl �� I Length Recoveredl]S/·7 161 I I Remarks:

\ 18 2C I 22

\ 24 26

\ 2"8 e-1t eLL ��c>� 30 Operator I Client Reps

V',// 32 I I I 34 t I t Length Retainedl:>/·7

CJ-i� ��d; 36 1 Shipped TO I

38 I I 40 f 1 Type Analysiss

1.s � I$. f V?Hj ! Da-:e : "2-3 t{.(�V��

) S:' -:9 J!M,.o'WtANS4"411 17 m� � C) :> C _�rne: L' - � . Core !.'

I

VIBRATORY CORE SAr(PLE LOG EXMAR VIRGIN;rA. .B�CH,�A- _ " .

Client, M�,. �:i��. ,,-F IJ�. ��L(vact� Location. Q �o,.�... M�. 0) W4l\/SL,o� Descri'Qtion �E:!'Oth Time for Penetration Support vessell ___ Bw..;:,-=lqr--:L=.:,o :::::::u...=--'---------

ft. Real Elapsed Per ft. P ·t· . M th d 1 " os]. ].on].ng e 0 • __ ---::��t'\c��:::;.:;.:;...;;\..-;;;;;;.-. _______ _

Positioning Information 1 ______ .-.;... __ ___ _

� J-�tM�C 77 (,1--�''"2- �J-, -Sqb II. Oe � " l(� ifJh 0 ; tJ L�). 7./;/' il· e'l()

'\ --:� Depth of Water. Est • Current •

�"E,"", 10 Wind. Seal Swell.

"t'''�T ( i2 Length of Barrel. yat Diam.Core. :1 ,0 .. 31-,{ , S 11.: \ . 14 Depth of Penetration. �4 I Length Recovered I 31-,(

16 Remarks. ------------------------------

\ �: 22

\ � ======�.====.=

.==================::;:==:::;;===

� : Operator I tM�.l1.� Client Rep, YS.i« 0 t<..it'1, C.:, /� 32 .. , 8� / 34 Length Retained.S�1 . ' �

36 Shipped To I I d I """j; G �J� i81 40 , Type Analysis , ________ _ _________ _

Bit Sample & Conditions _______ ----"'t:"!...::....- ....... 1 & ......... S---4::i�=-- -----_ -�_-_1 Date : 2-� t«a-1l·A::t 'ge Time I /01 S-l Si te #,4(AM OIw.,..S.�;J7I / e r,,, .... o 1.' -------

VIBRATORY CORE SAMPLE LOG

EXMAR VIRGINIA, .BEACH. VA-· . ...... . ..... � ient: J/AJ. � � .., )� -(!)f lAJ... R,�� � � scription

'-d Time for Penetration Denth ft. Real Elapsed Per ft. g

0 2 4

\ 6 e

S�E"lJ.. 10

IJ/jS'F-T \ 12 G-JlA--V 14

" L.:r i6 \ 18

20

\ 22 24 2�

\ n 30

\ �2 34

r"P 36 V'/ W. �H-T'I .i8 I eJ.A¥ 40 I Sit Sample & Conditionl

Locations e k�, � � � t-<A.aM. tJ IIV�SLt.9� Su�port Vessels B,� �� Positioning Method. �Q Positioning Information:

�C- '2-7 fo�L.� Lj-. 39() II.Z-'JJ 47,,- �5q·7 � 7b 2-/.7)-,' u.J

Depth of Vlater s Est.Currents

Wind: Sea. Swell.

Length of Barrel: �f)1 Diam.Corel �.o� Depth of Penetrationl .3 '-it') I Length Recovered. �b,B Remarks.

Operator I JUt "- et...t- Client Rep, �'vU e» Jt: Length Retained I -:>b · 9 j . Shipped To I e , 0if; Type Analysis.

Date: z.e /G{£ufll e; e Times

7��:>

qd(l>&/ 091-� c 1 Site #t<Aan (!) 'IU�S�,J �/'l Core # _______ _

J

VIBRATORY CORE SAMPLE LOG EXjJ1AR VIRGINIA: ..B�CH, VA-ient:h{l�]k�·bT,.l?�. �6l.W"&� Locations �L��64<.., _ ��-{}���ItJ '" 8 To --, scrintion I Deuth Time for Penetration Support vessela ' 4 Lou

�1 _f_t_. -+ _ Re_ a_ l __ I�E _ l _ap

_

s_e_d�T _P _ e _ r _

f_ t_. __ � Positioning Methoda ____ �b����_C_ · __________ __ __ __ __

6&-t .. hL wjCrlttv

sA�1>V SILT

Positioning Information: __________ ____ __________ __ __ 0 . I I �C ?--7 C::a-',b �4. "!>9' Ild)S-'/J -

\a \ :

c.; 2.._ �5e·" 4�. 7.'/' 'Z..}' b (tU C/

"i 10 , I 12

1 1 Length of Barrel: 4-0 ' Diam .Core a � ,0 .,

""-/1 --I 1 Depth of Penetrationr 40 r Length Recoveredr It.;,/ ( V/ .. ".,j 14 10 , Remarksl��'���J�������------------------ ----)Jo \O�(j :ihV'��h cJ:oC 18 20 -! �""�¥-=:o-v: :-C:=T �y<-- J..-r-!* -22 - I G �cpb��,,� ����+- (!)� 7�' -24 26

(!J 1, �vJ __ "'-. q g. � JJ ...., ,.� -t f!) S cv-c{� � � V'\.

>-L-t-"';'v;� � �.£-.Y- • OJ

28 30

- I 1 Operators i1A["..� Client Reps �� &� 32 -34

t Length Retained r ! q. r

. ..L cJ i I Shiuned Tor C k.t ;Ji) � �\�� 36 - -

.i8 I 40 f I Type Analysis r

�t S�ple & conditionl n -a-t-

e-:-������

--���$�A�---- -

T

�i -m -

e-a--���O�f�O�------� rJfNJ I Site #M.e.a O,IV ..... £I.�jf-za ).. core # 7=oA

VIBRATORY CORE SAMPLE LOG EXIf'lAR VIRc;INIl: .BEACH, YA-

Client % )vf.J.... - �. 0 f N-y\'· J.l.Lso � Locations {' ,� .... , "f.::,� � Yv4eJA/1 OlLUa-v- <;;ho

s� ,Jr,p..4YT "7 �I \..

_ ::>r _ Per;���� t ;�n I Support Ve s se ls ___ ---:B::;..;../...;.,'1�=L;;..' cd

...;t.L� __________ _ _ .l-......;;�_4----�1 Positioning Methods � c...

Positioning Information: ___ � _______ _

. I I �C- '7-7 b'-/.1:, ha;:t. �1f1 /).b�-IIJ Lt_2-�S-�t9 ��. 7(/ �,bJuJ

- ; I

�

Operators Ml..t � Client Reps ·-v ... , ......... ,:;rp

_ . I Length Retained I /I. '5"' 1 :....j... � , Shipped To I ('tooVf" ; ""'II l-. � � I 6\9 la-it $�{�

Type Anal ys is I �----------�----���R----�I

IT ! "?3.')&-'" '0, :7 -w",,, In ,,! q r_,"""" , Y' i Date: z.e ���Tlig Times /OS>-Site tlM� tJWtaA-->heJA-20.5 Core # 2i!J �

VIBRATORY CORE SAMPLE LOG EXiJ1AR VIRGINJl'.� .BP.CH, VAr

lient: MCl\· ut:i&. � c..f ).5 ii\.. K�e'/lfr'etlS Locationt C �A.. ."g� . W�1\ �i-CJ'-fM�DllUor escription I De�th Time for Penetration Support Vessels Ba,' LOu. S "--"cvf

1 ft. Real IElapsedl Per ft . P ' t' . M th d � ....,

GI2.�'LT

$J4EW­tJjG1J..AV

Sl L-T

5NJl)

os� �on�ng e 0 1 ___ ���...:o.-o =I-�=' ______ __ _

Pos i tioning Information 1 ______ ______ _ �f -� -t---+-

I---+

I-----I

I h� C 2-7,611·9 LJ. sq" II,t'lj

Y'_ 4 . . . 42-· �b6. 7 �. 7 t/ 2.0 .""3<9 II(}

6

\ a Depth of \'later I Est . Current I

\ 10 Wind: Seal Swell. ____ _

\ 12 Length of Barrel: y � I Diam .Core I :5 .. 0 4"f

�4 Depth of Penetrationl 34 ' Length Recoveredl2.9·0 16 Remarksl_� ___ -T __________ � __ � __ � ____ �_

\ 18 TQ/L A=rAGJr",r- '! lRmJ< 'i<{)g;;t

\ �� =tg,�...,�.

24 2�

f"1 =1 I 1 Client Rep, �� J� �2

: : I Operator. fA1.k� 34 I I

Length Retained. Z. 9.0 I • ..L 361 Shipped To I C uv*' I j; (;, 5?-9..t �� �81

I I 40 I I Type Anal ysis I

its�Ple&C�di)� -�-t-e-: -������ �� �,�3�---T�i- m-e -I-�/�/�3�O�---� 0- 1 Site Hr::....t-a-(>)/,( .... (J'�<;L..Jcore # A((€A 8 S l

TABLE 4. CORRECTED CORE LOCATIONS

UNCORRECTED CORRECTED

BOAT LORAN LATITUDE LONGITUDE LATITUDE LONGITUDE TD-X TD-Y DEG MINUTES DEG MINUTES DEG MINUTES DEG MINUTES

SEVENFOOT KNOLL*

1 39 09.4 76 24.4 2 39 09.5 76 24.2 3 39 09.6 76 24.0 4 39 09.55 76 24.01

MAN 0' WAR SHOAL 1 27630.10 42859.30 39 11.1067 76 22.9660 39 11.1413 76 23.2874 2 27628.60 42858.20 39 11.0019 76 22.7312 39 11.0374 76 23.0530 3 27629.50 42859.60 39 11.1237 76 22.8291 39 11 .1582 76 23.1505 4 27629.20 42860.50 39 11 • 1 909 76 22.7165 39 11.2257 76 23.0379 5 27627.90 42859.30 39 11 .0809 76 22.5279 39 11.1163 76 22.8493 6 27627.90 42859.50 39 11 .0964 76 22.5165 39 11.1319 76 22.8378 7 27628.10 42859.10 39 11.0674 76 22.5792 39 11.1028 76 22.9001

8 27627.70 42860.00 39 11.1337 76 22.4469 39 11 .1 690 76 22.7682 9 27626.90 42859.00 39 11.0454 76 22.3462 39 11 • 0811 76 22.6671 10 27625.70 4285j;10 39 11.0863 76 22.0670 39 11 .1223 76 22.3878

11 27626.30 42860.20 39 11.1330 76 22.1571 39 11.1690 76 22.4780 12 27625.70 42858.80 39 11 .01 56 76 22.1187 39 11.0518 76 22.4396 13 27625.20 42859.00 39 11.0250 76 22.0079 39 11.0614 76 22.3288

1 4 27624.10 42857.80 39 10.9177 76 21.8587 39 10.9543 76 22.1800 15 27624.40 42860.00 39 11 .0950 76 21.7909 39 11.1314 76 22.1114

16 27623.60 42859.80 39 11.0699 76 21.6431 39 11.1067 76 21.9640 17 27623.40 42859.60 39 11.0518 76 21.6151 39 11 .0886 76 21 .9360 18 27623.20 42860.00 39 11.0811 76 21.5520 39 11 • 11 77 76 21.8729 19 27622.50 42859.70 39 11.0490 76 21 .4307 39 11. 0863 76 21.7516

20A 27621.60 42858.90 39 10.9753 76 21.2984 39 11.0126 76 21 .61 88 20B 27621.60 42858.90 39 10.9753 76 21 .2984 39 11.0126 76 21.6188

AREA B 1 27617.90 42866.70 39 11. 5489 76 20.1146 39 11.5881 76 20.4332

* uncorrected latitude/longitude values recorded only

64

TABLE 5. WEIGHT OF SHELL (g) FOR EACH CORE SECTION (SHELLS GREATER THAN 1/2 INCH)

65

SEVENFOOT KNOLL

2

3

4

MAN O'WAR SHOAL 1

2

3

CORE INTERVAL

0-6.2 6.2-11.2 11.2-16.2 16.2-21 �2 21�2-26.2

0-6 6-11 11-16 16-21 21-26 26-31

0-5.5 5.5-11 11-16.5 16.5-21.5 21.5-26.5 26.5-31.5 31.5-36.5

0-5 5-11 .7 11.7-16.7 16.7-21.7 21.7-26.7

(ft)

21.7-22.7 22.7-26.7

0-5 5-11.8 11.8-16.8 16.8-21.8 21.8-26.8 26.8-31 �8

0-5 5-10.2 10.2-15.2 15.2-20.2 20-25.2 25.2-32.2

0-5 5-10 10-1-4.8 14.8-19.8 19.8-24.8

shells

WEIGHT OF SHELL COMPONENT (g)

1070 1833 2121

526 (no shell) ,

1615 1620 1686 1534 1754 (no shell) ,

2260 2030 1029 1000

464 878

(no shell) ,

640 2462 1031 1766

468

sand

sand

sand

coarse sand, peat at bottom

66

1701 1557 1458

980 1706

425

1496 1317 1257

647 1423

190 first 0.5 ft of interval shell, rest sand

2373 1475 1366 1389 1512

CORE WEIGHT OF SHELL MAN O'WAR SHOAL INTERVAL (ft) COMPONENT (g) 3 (cont.) 24.8-29.8 1713

29�8-34.8 no shell first 0.25 ft of interval - shell, rest sand

4 0-5 2173 5-10 1498 10-15.8 1580 15.8-20.8 2037 20.8-25.8 514 25�8-30.8 114 30.8-35.8 141

5 0-5 3219 5-12.7 2188 12.7-17.7 1420 17.7-22.7 1797 22.7-27�7 1607 27.7-32.7 544

6 0-5 2845 5-10 1295 10-15 1451 15-20 1253 20-25 1556 25-30 1771 30-35 473 33-35 muddy sand, last 0.5 ft gravel

7 0-6.5 3885 6.5-13.5 1384

13.5-18.5 1438 18.5-23.5 2018 23.5-28�5 1716 28.5-33.5 177

8 0-5 2427 5-10 1357 10-15.8 2150 15.8-20.8 1614 20.8-25.8 2240 25.8-30.8 1844 30.8-35.8 421

first 1.5 ft of interval - shell, rest sand

9 0-6 2516 6-13.2 1649 13.2-18.2 1745 18.2-23.2 1536 23.2-28�2 1936 28�2-33�2 532

67

CORE WEIGHT OF SHELL MAN O'WAR SHOAL INTERVAL (ft) COMPONENT (g)

10 0-5 2058 5-10 1430 10-16.4 1635 16.4-21.4 1549 21.4-26.4 1623 26.4-31.4 1737 31.4-36.4 160

31.4"'"32.4 shells and sandy mud 32.4-33.4 sandy mud 33�4-34.4 muddy sand 34�4-35.4 coarse sand

11 0-5 1519 5-11 590 11 -16 994 16-21 1086 21-26 772 26-31 no shells,

sand+gravel 12 0-5 2527

5-10 3003 10-17.6 2367 17.6-22.6 1477 22�6-27.6 1428 27.6-32.6 1623 32.6-37.6 772

32.6-34.6 shells in sand 34.6-35.6 clayey mud 35.6-37.6 muddy sand

13 0-6 2024 6-12.9 1615 12.9";'17.9 869 17�9-22.9 1792 22.9-27.9 1623

26.9-'-27.9 sandy clay, very cohesive 27.9-32.9 no shell,

muddy sand, some gravel

14 0-5 117 5-9.5 184 9.5-14.5 136 14.5-19.5 849 19.5-24.5 736 24.5-29�5 no shell,

brown sand

68

CORE WEIGHT OF SHELL MAN O'WAR SHOAL INTERVAL (ft) COMPONENT (g)

15 0-7 3475 7-13.7 1743 13.7-18.7 883 18�7-23.7 1735 23.7-28�7 1245 28�7-33.7 1279

16 0-6 1923 6-13.6 3620 13.6-18.6 1618 18�6-23�6 1647 23.6-28.6 1838 28.6-33.6 1740

17 0-6 2349

6-11.7 1471 11.7-16.7 1591 16�7-21.7 1803 21.7-26.7 1706 26.7-31�7 1199

18 0-6 2864 6-12.1 2709 12.1-17.1 1388 17. 1 -22.1 1602 22.1 -27.1 2752 27.1-32.1 1863

19 0-5 2780 5-10 3122 10-16.8 1911 16.8-21.8 2349 21.8-26.8 1832 26.8-31 �8 1678 31.8-36.8 1151

20A 0-5 3352 *coring stopped by 5-10 1171

obstruction 10-14.1 1824

20B 0-5 2577 *coring stopped by 5-11.5 2667

obstruction Bit sample 84

AREA B 1 0-5 2438

5-9 1443 9-14 1234 14-19 290 19-24 1853 24-29 1989

69

APPENDIX C

MATHEMATICAL CALCULATIONS

70

TABLE 6. MATHEMATICAL FORMULAS USED FOR CALCULATIONS IN THIS REPORT

1. Volume of cylinder (core cylinder); core diameter = 3 in

Vcyl lTr2h r=1 .5 in r2=2.25 in2 3.1416(2.25in2)(h) IT=3.1416 7.07 in2(hll) h=height in inches of shell ? in3

= ? yd3 1 yd3=46,656 in3

2. Pounds of shell per yd3 of bottom;

lbs of shell > 1/2 in yd3 of bottom

3. Pounds of shell per yd2 of bottom;

lbs of shell x thickness of shell yd3 of bottom bearing layer (yds)

4. yd3 of shell per yd2 of bottom;

lbs of shell + 1293 lbs of shell yd2 of bottom yd3 of shell

lbs of shell yd2 of bottom

yd3 of shell yd2 of bottom

1-5 gallon pail of shell 1 yd3 of shell

32 lbs of shell>1/2 inch 1293 lbs of shell

5. bushels per yd2 of bottom disturbed;

yd3 of shell + .06 yd3 = bushels yd2 of bottom bushel yd2 of bottom

1 Maryland bushel = 2800.9 in3 = .06 yd3

71

bearing section

TABLE 7. BASIC MEASUREMENTS AND CALCULATION OF POUNDS OF SHELL PER CUBIC YARD OF BOTTOM.

Length of weight of Core Pounds of Sevenfoot shell bearing shell >1/2

" Cylinder Sh�ll per Knoll section (in) (lbs) Volume (;[d3) yd of bottom

1 254.4 12.2 0.039 313 2 312 18 � 1 0.047 385 3 378 1 6 � 9 0.057 296 4 320.4 14' 0.049 286

Man O'War Shoal 1 381 .6 17.3 0.058 298 2 308.4 14 0�047 298 3 357�6 21.7 0.054 402 4 429�6 17.8 0.065 274 5 392.4 23.8 0.059 403 6 396 23.5 0.060 392 7 402 23�4 o � 061 384 8 387.6 26.6 0.059 451 9 398�4 21.9 0.060 365 10 388.8 22.5 0.059 381 11 312 10�9 0�047 232 12 415.2 29.1 0.063 462 13 322.8 17.5 0.049 357 14 294 4.5 0.045 100 15 404.4 22.8 0�061 374 16 403�2 27.3 o �061 448 17 380�4 22.3 0�058 384 18 385�2 29.1 0.058 502 19 441 .6 32�7 0�067 488 20A 169.2 14 0.026 538 20B 138 11.7 0.021 557

AREA B 1 348 20.4 0.053 385

72

TABLE 8. CALCULATED QUANTITIES OF SHELL >1/2 INCH PER SQUARE YARD OF SUBBOTTOM DISTURBED (TO BOTTOM OF SHELL BEARING LAYER)

lbs of shell per yd3 of shell per bushels per CORE yd2 of bottom yd2 of bottom yd2 of bottom

SEVENFOOT KNOLL 1 2212 1. 71 29 2 3337 2.58 43 3 3108 2.40 40 4 2545 1.97 33

MAN O'WAR SHOAL 1 3159 2.44 41 2 2553 1.97 33 3 3993 3�09 52 4 3270 2.53 42 5 4393 3.40 57 6 4312 3.33 56 7 4288 3�32 55 8 4856 3.76 63 9 4039 3 � 12 52 10 4115 3.18 53 11 2011 L56 26 12 5328 4.1 2 69 13 3201 2.48 41 14 817 0.63 11 15 4201 3�25 54 16 5018 3.88 65 17 4058 3.14 52 18 5371 4.15 69 19 5986 4�63 77 20A 2529 1.96 33 20B 2135 1.65 28

AREA B 1 3722 2.88 48

73

TABLE 8.

CORE

CALCULATED QUANTITIES OF SHELL >1/2 INCH PER SQUARE YARD OF SUBBOTTOM DISTURBED (TO BOTTOM OF SHELL BEARING LAYER)

lbs of shell per yd3 of shell per bushels per yd2 of bottom yd2 of bottom yd2 of bottom

SEVENFOOT KNOLL 1 2212 1. 71 29 2 3337 2.58 43 3 3108 2.40 40 4 2545 1.97 33

MAN O'WAR SHOAL 1 3159 2.44 41 2 2553 1.97 33 3 3993 3.09 52 4 3270 2.53 42 5 4393 3.40 57 6 4312 3.33 56 7 4288 3.32 55 8 4856 3.76 63 9 4039 3 � 12 52 10 4115 3.18 53 11 2011 L56 26 12 5328 4.12 69 13 3201 2.48 41 14 817 0.63 11 15 4201 3�25 54 16 5018 3.88 65 17 4058 3.14 52 18 5371 4.15 69 19 5986 4�63 77 20A 2529 1.96 33 20B 2135 1. 65 28

AREA B 1 3722 2.88 48

73

TABLE 9. DIGITIZED INFORMATION FROM FIGURE 6 AND CALCULATION OF AMOUNT OF BUSHELS FOR STUDY AREAS

DIGITIZED STUDY AREA (in2)

SEVENFOOT KNOLL 0.52 0.17

TOTALS 0.69

MAN O'WAR SHOAL 0.02 1.45 1. 47 1.06 2.62 0.30 0.08

TOTALS 7.04

SIXFOOT KNOLL

yd2

157,300 51 ,425

208,725

6050 438,625 444,675 320,650 792,550

90,750 24,200

2,129,600

8.52 2,577,300

AREA B 7.95 2,404,875

bushels/yd2 of bottom

30 to 40 (ave 35) >40

bushels

5,505,500±786,500 2,057,000 minimum 7,562,500±786,500

minimum amount of bushels 6,776,000 maximum amount of bushels 8,349,000

<20 121 ,000 mInimUm <30 13,158,750 minimum 30 to 40 (ave 35) 15,563,625±2,223,375 40 to 50 (ave 45) 14,429,250±1,603,250 50 to 60 (ave 55) 43,590,250±3,962,750 60 to 70 (ave 65) 5,898,750±453,750 >70 1,694,000 minimum

94,455,625±8,243,125

minimum amount of bushels 86,212,500 maximum amount of bushels 102,698,750

? ?(*)

48 ?(*)

Figure 6 parameters used in calculations; chart scale = 1 :20,000 1 in = 550 yds

(*) undetermined due to lack of coring data

74