Updated tops file for Cretaceous and lower Tertiary units, Piceance Basin, northwest Colorado

Open-File Report 2015-1036
By: , and 

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Introduction

Depths to selected Cretaceous and lower Tertiary stratigraphic units in the Piceance Basin, northwestern Colorado are presented here for 1,563 wells. This file is updated from the Piceance Basin Oil Shale Database with data for additional new drill holes. Also included in this report are elevations for the base of the Long Point Bed of the Eocene Green River Formation for 347 surface locations obtained by determining locations and elevations from published 7 ½-minute quadrangle maps for the Piceance Basin listed in the “Geologic Maps Used to Generate Long Point Control Points” section.

Each entry for the base of the Long Point Bed was obtained at a location where the mapped Long Point Bed intersects a contour line on the published maps. Precision of each elevation is therefore dependent on the precision of the maps and the placement of the mapped contact by the authors.

Suggested Citation

Johnson, R.C., Dietrich, J.D., and Mercier, T.J., 2015: Updated tops file for Cretaceous and lower Tertiary units, Piceance Basin, northwest Colorado: U.S. Geological Survey Open-File Report 2015–1036, 16 p., http://dx.doi.org/10.3133/ofr20151036.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Introduction
  • Cretaceous Units
  • Lower Tertiary Units
  • References Cited
  • Geologic Maps Used to Generate Long Point Control Points
  • Figures

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Updated tops file for Cretaceous and lower Tertiary units, Piceance Basin, northwest Colorado
Series title Open-File Report
Series number 2015-1036
DOI 10.3133/ofr20151036
Year Published 2015
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Central Energy Resources Science Center
Description Report: iii, 16 p.; Excel Files
Country United States
State Colorado
Other Geospatial Piceance Basin
Online Only (Y/N) Y
Additional Online Files (Y/N) Y