| Abstract: | The Great Falls tectonic zone, here named, is a belt of diverse northeast-trending geologic features that can be traced from the Idaho batholith in the Cordilleran miogeocline, across thrust-belt structures and basement rocks of west-central and southwestern Montana, through cratonic rocks of central Montana, and into southwestern-most Saskatchewan, Canada. Geologic mapping in east-central Idaho and west-central Montana has outlined a continuous zone of high-angle faults and shear zones. Recurrent fault movement in this zone and strong structural control over igneous intrusion suggest a fundamental tectonic feature that has influenced the tectonic development of the Idaho-Montana area from a least middle Proterozoic time to the present. Refs. |
| Genre: | Article |
| ProdID: | 70013055 |
| Citation Author: | O'Neill, J. Michael; Lopez, David, A. |
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| Citation End Page: | 447 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | American Association of Petroleum Geologists Bulletin |
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| Citation Number Of Pages: | 11 |
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| Citation Search Results Text: | CHARACTER AND REGIONAL SIGNIFICANCE OF GREAT FALLS TECTONIC ZONE, EAST-CENTRAL IDAHO AND WEST-CENTRAL MONTANA.; 1985; Article; Journal; American Association of Petroleum Geologists Bulletin; O‘Neill, J. Michael; Lopez, David, A. |
| Citation Start Page: | 437 |
| Citation Volume: | 69 |
| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | CHARACTER AND REGIONAL SIGNIFICANCE OF GREAT FALLS TECTONIC ZONE, EAST-CENTRAL IDAHO AND WEST-CENTRAL MONTANA.; 1985; Article; Journal; American Association of Petroleum Geologists Bulletin; O‘Neill, J. Michael; Lopez, David, A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1985 00:00 -0600 |
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