| 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. |
| Genre: | USGS Numbered Series |
| ProdID: | 15258 |
| Citation Author: | Olson, Jerry Chipman |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | 13 leaves :ill., maps ;27 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 76-222 |
| Citation Search Results Text: | Uranium in the Cochetopa District, Colorado, in relation to the Oligocene erosion surface; 1976; OFR; 76-222; Olson, Jerry Chipman |
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| Citation Year: | 1976 |
| Type: | citation/reference |
| Text: | Uranium in the Cochetopa District, Colorado, in relation to the Oligocene erosion surface; 1976; OFR; 76-222; Olson, Jerry Chipman |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1976/0222/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/1976/0222/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
