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Scientific Investigations Map 3276

Detailed Cross Sections of the Eocene Green River Formation along the North and East Margins of the Piceance Basin, Western Colorado, Using Measured Sections and Drill Hole Information

By Ronald C. Johnson

Thumbnail of and link to report PDF (3.84 MB)Abstract

This report presents two detailed cross sections of the Eocene Green River Formation in the Piceance Basin, northwestern Colorado, constructed from eight detailed measured sections, fourteen core holes, and two rotary holes. The Eocene Green River Formation in the Piceance Basin contains the world’s largest known oil shale deposit with more than 1.5 billion barrels of oil in place. It was deposited in Lake Uinta, a long-lived saline lake that once covered much of the Piceance Basin and the Uinta Basin to the west. The cross sections extend across the northern and eastern margins of the Piceance Basin and are intended to aid in correlating between surface sections and the subsurface in the basin.

First posted March 10, 2014

For additional information contact:
Director, Central Energy Resources Science Center
U.S. Geological Survey
Box 25046, MS-939
Denver Federal Center
Denver, CO 80225-0046
http://energy.usgs.gov/

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Suggested citation:

Johnson, R.C., 2014, Detailed cross sections of the Eocene Green River Formation along the north and east margins of the Piceance Basin, western Colorado, using measured sections and drill hole information: U.S. Geological Survey Scientific Investigations Map 3276, 11 p., 2 sheets, https://dx.doi.org/10.3133/sim3276.

ISSN 2329-132X (online)



Contents

Introduction

Stratigraphic Subdivisions of the Green River Formation

Constructing the Detailed Cross Sections

References Cited


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