Uranium in the Cochetopa District, Colorado, in relation to the Oligocene erosion surface
January 1, 1976
In the Cochetopa district, Colorado, the sequence of Mesozoic and Cenozoic events is as follows: development of a relatively smooth, planar erosion surface in Jurassic time; deposition, on this surface, of the Junction Creek Sandstone and Morrison Formation of Jurassic age, followed by deposition of the Dakota Sandstone and Mancos Shale of Cretaceous age; Laramide tilting and faulting; erosion to form a terrane of moderate relief in Oligocene time; deposition of lava flows and volcanic breccia of intermediate composition and of ash-flow tuff, all of Oligocene age; and subsequent erosion and canyon-cutting by Cochetopa Creek, a superimposed stream, and its tributaries.
Citation Information
Publication Year | 1976 |
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Title | Uranium in the Cochetopa District, Colorado, in relation to the Oligocene erosion surface |
DOI | 10.3133/ofr76222 |
Authors | Jerry Chipman Olson |
Publication Type | Report |
Publication Subtype | USGS Numbered Series |
Series Title | Open-File Report |
Series Number | 76-222 |
Index ID | ofr76222 |
Record Source | USGS Publications Warehouse |