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Book Chapter

Road Log, Day Four: Nonmarine Sequence Stratigraphy and Facies Architecture of the Downdip Castlegate Sandstone in the Book Cliffs of Western Colorado and Eastern Utah

By
John C. Van Wagoner
John C. Van Wagoner
Exxon Production Research Company Houston, Texas
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Published:
January 01, 1991

Abstract

OBJECTIVES: Today the Castlegate will be traced to the most basinward facies exposed in the Book Cliffs completing an updip to downdip analysis of the Castlegate sequence boundary and systems tracts. The Desert will be seen only at STOP ONE. As the Castlegate sequence boundary is traced basinward, changes in the sequence-boundary expression will be examined. These expressions will be compared with the expression of the sequence boundary seen yesterday. Changes in incised-valley geometry will also be studied, especially in the Horsepasture area of STOP THREE, time and weather permitting. Laramide deformation appeared to influence the Castlegate sequence boundary around the Colorado-Utah border. This influence will be examined later in the day.

Leave the motel parking lot in Moab. Drive north on Highway 191. The road log begins at the bridge crossing the Colorado River outside of Moab.

0.0 Crossing the Colorado River on the north side of Moab.

2.7 Passing the entrance to Arches National Park. This park contains the greatest density of natural arches in the world from a three-foot opening to the largest, Landscape Arch. This 105-foot high ribbon of rock measures 291 feet across. Much of the faulting in the Jurassic and Triassic rocks around Moab is controlled by movement of Pennsylvanian salt, 1000's of feet thick in some places.

8.6 Pass the turnoff to Dead Horse Point.

25.0 The Mancos, Desert, and Castlegate can be seen along the Book Cliffs to the north.

29.1 Turn right onto the access road for 1-70. Drive east toward

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Contents

AAPG Special Publication

Sequence Stratigraphy Applications to Shelf Sandstone Reservoirs: Outcrop to Subsurface Examples

J. C. Van Wagoner
J. C. Van Wagoner
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C. R. Jones
C. R. Jones
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D. R. Taylor
D. R. Taylor
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D. Nummedal
D. Nummedal
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D. C. Jennette
D. C. Jennette
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G. W. Riley
G. W. Riley
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American Association of Petroleum Geologists
ISBN electronic:
9781629811161
Publication date:
January 01, 1991

GeoRef

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