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Road Log, Day Three: Nonmarine Sequence Stratigraphy and Facies Architecture of the Updip Desert and Castlegate Sandstones 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: The Desert and updip Castlegate provide an opportunity to study well-exposed sequences and systems tracts in nonmarine to marine settings. Because of the excellent quality of the outcrops, sequence boundaries can be traced continuously from the nonmarine, where the identification of sequence boundaries has historically been less certain, to the marine, where sequence boundaries can be well defined based on basinward shifts in facies. These outcrops also allow regional correlation of systems tracts and identification of exploration-scale facies changes within systems tracts. These stops demonstrate that sequence boundaries are regionally extensive, single physical surfaces that can be used to correlate in outcrop and the subsurface. These stops also show that strata between sequence boundaries are arranged in predictable packages and that facies within these packages commonly, but not always, have predictable characteristics.

0.0 Leave the parking lot of the Best Western River Terrace Motel in Green River, Utah. Turn right on the main road, Highway 6.

0.2 Turn left on the paved road. Drive north toward the Book Cliffs. This road parallels the Green River and is built on the Mancos Shale.

5.3 After ascending a hill which climbs on top of the Mancos out of the Green River alluvial valley, turn off of the paved road onto a gravel road that heads northeast directly toward Tuscher Canyon.

6.0 STOP ONE. Pull over to the side of the gravel road for an overview of the stratigraphy of the Desert Member of the Blackhawk Formation and the Castlegate Sandstone. This

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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

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