Geologic map of the Skull Creek quadrangle, Moffat County Colorado

IMAP 2647
By: , and 



The Skull Creek quadrangle is in northwestern Colorado a few miles north of Rangely. The prominent structural feature of the Skull Creek quadrangle is the Skull Creek monocline. Pennsylvanian rocks are exposed along the axis of the monocline while hogbacks along its southern flank expose rocks that are from Permian to Upper Cretaceous in age. The Wolf Creek monocline and the Wolf Creek thrust fault, which dissects the monocline, are salient structural features in the northern part of the quadrangle. Little or no mineral potential exists within the quadrangle. A geologic map of the Lazy Y Point quadrangle, which is adjacent to the Skull Creek quadrangle on the west, is also available (Geologic Investigations Series I-2646). This companian map shows similar geologic features, including the western half of the Skull Creek monocline. The geology of this quadrangle was mapped because of its proximity to Dinosaur National Monument. It is adjacent to quadrangles previously mapped to display the geology of this very scenic and popular National Monument. The Skull Creek quadrangle includes parts of the Skull Creek Wilderness Study Area, which was assessed for its mineral resource potential.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Geologic map of the Skull Creek quadrangle, Moffat County Colorado
Series title IMAP
Series number 2647
Subseries GIS
DOI 10.3133/i2647
Year Published 1999
Language English
Publisher U.S. Geological Survey
Description 1 Plate: 37.75 × 32.56 inches
Country United States
State Colorado
County Moffat County
Other Geospatial Skull Creek quadrangle
Scale 24000
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Additional publication details