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Las Animas formation (upper Precambrian) in the subsurface of southeastern Colorado by Ogden Tweto

By: Tweto, Ogden, 1912-1983Material type: TextTextSeries: U.S. Geological Survey bulletinPublication details: Washington U.S. Govt. Print. Off. 1983Description: III, 14 p. : illSubject(s): Geology, Stratigraphic -- Precambrian | Geology -- ColoradoDDC classification: 557.3 s | 551.7/15 LOC classification: QE75 | .B9 no. 1529G | QE653
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