lgc field course in the book cliffs, ut: presentation 5 of 14 (gentile wash - storrs & spring...

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William W. Little© 2015 by W.W. Little Geological Consulting, LLC

Gentile Wash: Storrs & Spring Canyon Mbrs

(TST to HST – offshore marine to coastal plain)

Photo by W. W. Little

Shoreface Facies Model

From SEPM Strata (sepmstrata.org)

Jolley (2015)

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Panther Tongue

Storrs Member

STAR

PO

INT

SAN

DSTO

NE

BLAC

KHAW

K FO

RMAT

ION

Sprin

g Ca

nyon

Mbr

Wildcat PS

Sowbelly PS

Hardscrabble PS

Heiner & Helper PSs

Aberdeen Mbr

Photo by W. W. Little

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Storrs Mbr (3 retrogradational to aggradational parasequences)

The lower parasequence consists of: laminated ms (offshore) -> interbedded laminated ms and hummocky-laminated ss (transition zone) -> hummocky-laminated ss (lower shoreface). Overlying parasequences become progressively more dominated by more distal facies.

Photo by W. W. Little

Lower Storrs Parasequence

Photo by W. W. Little

Photo by W. W. Little

Hummocky-laminated SS (lower shoreface)

Photo by W. W. Little

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Trough Cross-bedded to Horizontally-laminated SS (upper shoreface to

foreshore)

Photo by W. W. Little

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Ophiomorpha Burrows

Photos by W. W. Little

Upper Storrs Parasequence

Photo by W. W. Little

Horizontally-laminated MS (offshore)

Photo by W. W. Little

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Each parasequence consists of: laminated ms (offshore) -> interbedded laminated ms and hummocky-laminated ss (transition zone) -> hummocky-laminated ss (lower shoreface)

Spring Canyon Mbr (5 parasequences)

Photo by W. W. Little

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Sprin

g Ca

nyon

Mbr

Stor

rs M

br

Helper PS

Sowbelly PS

Hardscrabble PS

Heiner PS

Wildcat PS

MFS

Photo by W. W. Little

Sowbelly Parasequence

Photo by W. W. Little

Interbedded Horizontally-

laminated MS and Hummocky-laminated

SS (transition zone)

Photo by W. W. Little

Hummocky-laminated SS

Photo by W. W. Little

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Trough Cross- to Horizontally-laminated SS

Photo by W. W. Little

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Trough Cross-laminated SS

Photo by W. W. Little

DSC07075 Photo by W. W. Little

Photo by W. W. Little

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Contorted SS

Photo by W. W. Little

Photo by W. W. Little

DSC07078 Photo by W. W. Little

Panther Tongue

Mancos Sh

Storrs Mbr

Wildcat PS

Sowbelly PS

Hardscrabble PSHeiner PSHelper PSAberdeen MbrBlackhawk Fm undif.

TS

SB

MFS

One Last Look

Photo by W. W. Little

Photo by W. W. Little