Uranium in the Cochetopa District, Colorado, in relation to the Oligocene erosion surface
Open-File Report
76-222
By: Jerry Chipman Olson
Links
- Document: Report (pdf)
- Download citation as: RIS | Dublin Core
Abstract
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.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Uranium in the Cochetopa District, Colorado, in relation to the Oligocene erosion surface |
| Series title | Open-File Report |
| Series number | 76-222 |
| DOI | 10.3133/ofr76222 |
| Edition | - |
| Year Published | 1976 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey, |
| Description | 13 leaves :ill., maps ;27 cm. |
| Google Analytic Metrics | Metrics page |