| Abstract: | Geologic mapping shows evidence that many principal faults of the Lewis and Clark line, such as the St. Marys-Helena Valley, Bald Butte, Ninemile, and Osburn faults, had right separation or slip that ranged between 28 and 11 km, and this displacement probably occurred during Late Cretaceous time. Other faults, such as the Elevation Mountain, Placer Creek, and Ranch Creek faults, have Late Cretaceous right separations that range between 8 and 3.2 km, and the Mount Sentinel fault zone has between 6.5 and 3 km of right separation of probable Late Cretaceous age. Subsidiary structures, sedimentation patterns and depositional environments are discussed. -after Authors |
| Genre: | Article |
| ProdID: | 70015852 |
| Citation Author: | Wallace, C. A.; Lidke, D. J.; Schmidt, R. G. |
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| Citation End Page: | 1037 |
| Citation Issue: | 8 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geological Society of America Bulletin |
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| Citation Number Of Pages: | 17 |
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| Citation Search Results Text: | Faults of the central part of the Lewis and Clark line and fragmentation of the Late Cretaceous foreland basin in west-central Montana; 1990; Article; Journal; Geological Society of America Bulletin; Wallace, C. A.; Lidke, D. J.; Schmidt, R. G. |
| Citation Start Page: | 1021 |
| Citation Volume: | 102 |
| Citation Year: | 1990 |
| Type: | citation/reference |
| Text: | Faults of the central part of the Lewis and Clark line and fragmentation of the Late Cretaceous foreland basin in west-central Montana; 1990; Article; Journal; Geological Society of America Bulletin; Wallace, C. A.; Lidke, D. J.; Schmidt, R. G. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1990 00:00 -0600 |
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