by robert b. scott and anne e. harding - u.s. geological ... · tbiu t 3 tbiu qta qtes tby qt1 qc...
TRANSCRIPT
MAP LOCATION
NEVADA
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SPRINGS
KANE
WASH
CALDERA
MARGIN
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Stratigraphic contact—Dip of contact shown in some areas
Intrusive contact—Dip of contact shown in some areas
Margin of area underlain by exposed K horizon in unit Tam
High-angle normal fault—Showing dip (barbed arrow) and trend and plunge of lineation (diamond-shaped arrow). Dashed where approxi-mately located; dotted where concealed; queried where uncertain. Bar and ball on downthrown side
Thrust fault—Solid teeth on upthrown side. Dashed where approximately located; dotted where concealed
Landslide margin—Open teeth on the landslide side. Dashed where approximately located
Fault scarp along which younger unit has been deposited—Hachures on side of postfault deposit
Strike and dip of sedimentary beds and of compaction foliation of ash-flow tuffs
Inclined
Horizontal
Trend and plunge of flow lineation on compaction foliation
Strike and dip of flow foliation—In lava flow or flow foliation created by post-emplacement flow in an ash-flow tuff
Inclined
Vertical
Flow lineation on flow foliation
Flow lineation
Hydrothermally altered area
Caldera margin (topographic wall)—Half-circles on down-dropped caldera interior. Dotted where concealed; queried where uncertain
Prospect
5370
79
30
65 36
79
7936
36
Qal
Qae
Qaj
Qaw
QTes Tc QTa
Qt1
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Qt2.5
Qt2
Angular unconformity
Angular unconformity
Post-collapse extracaldera units
Post-collapse caldera-filling units
BEDROCK UNITS
CORRELATION OF MAP UNITSSURFICIAL UNITS
Tbt
Tby
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Tbd
Tam
Tmh
Pliocene
Holocene
Alluvial and colluvial depositsEolian deposits
Colluvial deposits
QuaternaryLate Pleistocene
Middle Pleistocene
Early Pleistocene
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7000 FEET1000 10000 2000 3000 4000 5000 6000
.5 1 KILOMETER1 0
SCALE 1:24 0001/ 21 0 1 MILE
CONTOUR INTERVAL 40 FEET DATUM IS MEAN SEA LEVEL
U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY
SCIENTIFIC INVESTIGATIONS MAP 2892Version 1.0
Pamphlet accompanies map
Bedrock and surficial geologic mapping by Robert Scott and Anne Harding in 1995 and 1989, respectively
Map digitized by Randy Kuehn; GIS database by Sharon SmithDigital cartography by Norma MaesEdited by F.C. Brunstein
Base from U.S. Geological Survey, 1969Polyconic projection, 1927 North American datum10,000-foot grid based on Nevada coordinate system, east zone; 1,000-meter Universal Transverse Mercator grid ticks, Zone 11
SURFICIAL UNITS
Alluvial and Colluvial Deposits
LIST OF MAP UNITS
Alluvium and colluvium (late Holocene)Alluvium and colluvium (early Holocene and latest Pleistocene)
Alluvial and colluvial terrace deposits (early Holocene and latest Pleistocene)
Alluvium and colluvium of Jumbo Wash (late Pleistocene)
Alluvial and colluvial terrace deposits (late Pleistocene)
Alluvial and colluvial terrace deposits (late Pleistocene)
Alluvium and colluvium of Willow Spring (middle Pleistocene)
Alluvial and colluvial terrace deposits (middle Pleistocene)
Alluvium and colluvium (early Pleistocene and Pliocene?)
Aggradational side-stream fan deposits (Pliocene)
Aggradational main-stream fan deposits (Pliocene)
Alluvium and colluvium of Willow Spring (middle Pleistocene) over aggradational side-stream fan deposits (Pliocene)
Eolian depositEolian silt (early Pleistocene? and Pliocene?)
Colluvial depositsColluvium (Quaternary)
Colluvium (Pliocene)
BEDROCK UNITS
Post-collapse extracaldera
Muddy Creek and Horse Spring Formations (late? and middle Miocene)
Basaltic flows (Miocene)
Basaltic dike (Miocene)
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Post-collapse caldera-filling units
Upper basaltic intracaldera flows (Miocene)
Aphyric rhyolitic dikes (Miocene)
Rhyolitic dikes (Miocene)
Rhyolitic dike swarm (Miocene)Aphyric rhyolitic flows (Miocene)
Rhyolitic flows (Miocene)
Yellow ash-flow tuff (Miocene)
Red ash-flow tuff (Miocene)
Gray rhyolite flows (Miocene)
Biotite-rhyolitic flows (Miocene)
Biotite-rhyolitic dikes (Miocene)
Red-lithic rhyolitic ash-flow tuff (Miocene)
Trachytic stock (Miocene)
Lower basaltic intracaldera flows (Miocene)
Caldera wall breccia (Miocene)
Kane Springs Wash caldera in-flow units
Kane Wash Tuff (Miocene)
Gregerson Basin Member
Flow-lineated cooling unit
Trachytic zone
Comenditic zone
Quartz-rich rhyolitic ash-flow tuff
Welded lithic-rich rhyolitic tuff
Columnar-jointed cooling unit
Trachytic zone Comenditic zone
Lower tuffs (Miocene) shown in cross section only
Kane Wash Tuff (Miocene)
Gregerson Basin Member
Lower cooling unit
Trachytic zone
Comenditic zone
Grapevine Spring Member
Pre-Kane Springs Wash caldera units
Precaldera trachyte (Miocene)
Pumice-rich ash-flow tuff of Narrow Canyon caldera (Miocene)
Sunflower Mountain Tuff, undivided (Miocene)
Upper zone
Lower zone
Tuffaceous sandstone (Miocene)
Delamar Lake Tuff (Miocene)
Hiko Tuff (Miocene)
Harmony Hills Tuff (Miocene)
Bauers Tuff Member of the Condor Canyon Formation (Miocene)
Leach Canyon Formation (Oligocene)
Unnamed rhyolitic ash-flow tuff (Oligocene)
Unnamed red limestone (Oligocene)
Unnamed gray limestone and pebble conglomerate (Oligocene)
Unnamed rhyolitic ash-flow tuff (Oligocene)
Unnamed gray limestone and red pebble conglomerate (Oligocene)
Unnamed rhyolitic ash-flow tuff (Oligocene)Unnamed limestone (Oligocene)
Unnamed cobble conglomerate (Oligocene)
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1969 MAGNETICDECLINATION
15 / °1 2
MAG
NET
IC N
OR
TH
TRU
E N
OR
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×
A′
A
Trd
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Kane Springs Wash caldera inflow units
Pre-Kane Springs Wash caldera units
Major angular unconformity
Traf
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Tt
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Thh
Tcb
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Trls
Tgls
Tlpc
Tt2
Tt3
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Tcg
Pkt
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Miocene
Localunconformities
Oligocene
Tertiary
Permian
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ByRobert B. Scott1 and Anne E. Harding2
2006
GEOLOGIC MAP OF THE VIGO NE QUADRANGLE, LINCOLN COUNTY, NEVADAManuscript approved for publication July 15, 2005
Any use of trade names in this publication is fordescriptive purposes only and does not implyendorsement by the U.S. Geological Survey
For sale by U.S. Geological Survey Information ServicesBox 25286, Federal Center, Denver, CO 80225This map was produced on request, directly fromdigital files, on an electronic plotter. It is also available as a PDF file at http://pubs.usgs.gov/1-888-ASK-USGS
ArcInfo coverages and a PDF for this map are available athttp://pubs.usgs.gov
1U.S. Geological Survey, Denver, CO 802252Volunteer, U.S. Geological Survey, Denver, CO 80225
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A A′
METERS
1000 1000
SEA LEVEL SEA LEVEL
METERS
Kan
e S
pri
ng
s W
ash
ca
lder
a m
arg
inMeadow Valley Mountains
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Tkfc TkjtTkjt Tkft Tyt
Bedded tuff (Miocene)
Kane Springs Wash caldera outflow units
Paleozoic units
Kaibab Limestone and Toroweap Formation, undivided (Lower Permian)
Red beds (Lower Permian)
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