| Title: | Depositional history of Triassic rocks in the area of the Powder River Basin, northeastern Wyoming, and southeastern Montana |
| Author: | Johnson, Edward A. (Edward Allison), 1940- |
| Author: | Geological Survey (U.S.) |
| Note: | U.S. G.P.O. ;, 1993 |
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| Link: | page images at HathiTrust |
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| Subject: | From 190 to 230 million years ago |
| Subject: | Geology |
| Subject: | Geology Powder River Basin (Wyo. and Mont.) |
| Subject: | Geology, Stratigraphic |
| Subject: | Geology, Stratigraphic Triassic |
| Subject: | Geology, Stratigraphic -- Triassic |
| Subject: | Geology -- Powder River Basin (Wyo. and Mont.) |
| Subject: | Sedimentation and deposition |
| Subject: | Sedimentation and deposition Powder River Basin (Wyo. and Mont.) |
| Subject: | Sedimentation and deposition -- Powder River Basin (Wyo. and Mont.) |
| Subject: | Triassic Geologic Period |
| Subject: | United States -- Powder River Basin |
| Other copies: | Look for editions of this book at your library, or elsewhere. |