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Geologic map of the Lazy Y Point Quadrangle, Moffat County Colorado

January 1, 1999

The Lazy Y Point quadrangle is in northwestern Colorado a few miles north of Rangely. The prominent structural feature of the Lazy Y Point 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 Skull Creek quadrangle, which is adjacent to the Lazy Y Point quadrangle on the east, is also available (Geologic Investigations Series I-2647). This companian map shows similar geologic features, including the eastern 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 Lazy Y Point quadrangle includes parts of the Willow and Skull Creek Wilderness Study Areas, which were assessed for their mineral resource potential.

Publication Year 1999
Title Geologic map of the Lazy Y Point Quadrangle, Moffat County Colorado
DOI 10.3133/i2646
Authors R. E. Van Loenen, G.I. Selner, W. A. Bryant
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title IMAP
Series Number 2646
Index ID i2646
Record Source USGS Publications Warehouse