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Scales of Heterogeneity of a Leveed-channel System, Cretaceous Dad Sandstone Member, Lewis Shale, Wyoming, USA

By
Roger M Slatt
Roger M Slatt
1
School of Geology and Geophysics, University of Oklahoma, Oklahoma, USA
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Jonathan Minken
Jonathan Minken
2
Amerada-Hess, Co., New York, USA
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Staffan K Van Dyke
Staffan K Van Dyke
3
Vanco Energy Co., Houston, Texas, USA
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David R Pyles
David R Pyles
4
Bureau of Economic Geology, Jackson School of Geosci-ences, University of Texas at Austin, Texas, USA: Present address: chevron Center of Research Excellence, Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado, USA
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Alan J Witten
Alan J Witten
1
School of Geology and Geophysics, University of Oklahoma, Oklahoma, USA
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Roger A Young
Roger A Young
1
School of Geology and Geophysics, University of Oklahoma, Oklahoma, USA
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Published:
January 01, 2008

Abstract

The Cretaceous Lewis Shale-Fox Hills-Lance Formations in southern Wyoming (Figure 1) were deposited during the final transgressive-regressive cycle of the Cretaceous western interior seaway (Figure 2). These formations comprise a third-order highstand systems tract (Figure 3) composed of several fourth-order lowstand-highstand cycles. One of these fourth-order cycles is well exposed in three outcrops — called Spine 1, Spine 2, and Rattlesnake Ridge — over a distance of 3.2 km (2 mi) (Figure 4). The strata within these outcrops are important for two reasons: 1) they provide good outcrop exposures of the Lewis Shale in an area of active exploration for gas, and 2) the Dad Sandstone Member of the Lewis Shale here is considered to be an excellent, scaled analog of delta-fed, mud-dominated, progradational, turbidite systems that are hydrocarbon-productive in areas such as the Gulf of Mexico and offshore west Africa.

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Contents

AAPG Studies in Geology

Atlas of Deep-Water Outcrops

Tor H. Nilsen
Tor H. Nilsen
Desceased
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Roger D. Shew
Roger D. Shew
University of North Carolina
Wilmington, North Carolina
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Gary S. Steffens
Gary S. Steffens
Shell International E&P
Houston, Texas
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Joseph R. J. Studlick
Joseph R. J. Studlick
Maersk Oil America Inc.
Houston, Texas
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American Association of Petroleum Geologists
Volume
56
ISBN electronic:
9781629810331
Publication date:
January 01, 2008

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