Geology And Ore Deposits Of The Philipsburg Quadrangle Montana Issue 78
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Geology and Ore Deposits of the Philipsburg Quadrangle Montana
Author | : William Harvey Emmons,Frank C. Calkins |
Publsiher | : Franklin Classics Trade Press |
Total Pages | : 302 |
Release | : 2018-11-11 |
Genre | : History |
ISBN | : 0353375721 |
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This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Geological Survey Professional Paper
Author | : Geological Survey (U.S.) |
Publsiher | : Unknown |
Total Pages | : 414 |
Release | : 1982 |
Genre | : Geology |
ISBN | : MSU:31293015246147 |
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U S Geological Survey Professional Paper
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 242 |
Release | : 1984 |
Genre | : Geology |
ISBN | : MINN:31951P001664705 |
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U S Geological Survey Bulletin
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 40 |
Release | : 1983 |
Genre | : Geology |
ISBN | : RUTGERS:39030041198518 |
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U S Geological Survey Bulletin
Author | : Arthur Edward Nelson,James George Evans,Thomas Llewellyn Wright,Margaret T. Mangan,Donald Alan Swanson |
Publsiher | : Unknown |
Total Pages | : 280 |
Release | : 1983 |
Genre | : Basalt |
ISBN | : OSU:32435022084438 |
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Deformation Quadrangle, 1n the Stensgar Mountain Stevens County, Washington By James G. Evans Abstract Most deformation of the Middle and Late Proterozoic (Deer Trail and Windermere Groups) and Lower Cambrian (Addy Quartzite and Old Dominion Limestone) rocks in the Stensgar Mountain quadrangle occurred during the Mesozoic (pre-Late Jurassic, possibly Early Jurassic or Triassic), in con- nection with duplex thrusting. The principal deformation occurred in stages that generally involved: (1) thrusting, (2) penetrative dynamothermal metamorphism in the greenschist facies, and (3) renewed thrusting. The initial thrusting may have included formation of the duplex fault zone, moderate tilting of the sedimentary and volcanic rocks, and possibly low-grade metamorphism. The dynamothermal metamorphism resulted in development of a slaty cleavage that dips steeply west, as well as numerous minor and a few large folds that plunge at low to moderate angles, generally north. The folds have axial planes parallel to cleavage. Clasts in conglomerates were flattened parallel to cleavage, and their long axes were aligned north-northeastward, subparallel to fold axes. This extension direction parallels the trend of the Kootenay arc, a relation not typical of orogenic belts. The dynamothermal metamorphism included coaxial compressive pulses separated by periods of stress relaxation. The penetra- tive deformation could have been accompanied by slip on preexisting faults, including a large strike-slip component for the roof (Stensgar Mountain thrust) and floor (Lane Mountain thrust) thrusts of the duplex fault zone. Later movements along these roof and floor thrusts and connecting splays are suggested by nonfolded traces of the faults and the faulted, dynamothermally metamorphosed cataclasite adjacent to the Lane Mountain thrust. The penetrative deformation that affected the Stensgar Mountain quadrangle also affected the rest of northeastern Washington and southeastern British Columbia; it may have been the result of oblique convergence during Mesozoic subduction.
Rocks and Structure of the Southern Sapphire Mountains Granite and Ravalli Counties Western Montana
Author | : Geological Survey (U.S.) |
Publsiher | : Unknown |
Total Pages | : 40 |
Release | : 1989 |
Genre | : Geology |
ISBN | : ERDC:35925000873221 |
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A description and map of a thrust-sheet terrane dominated by the Middle Proterozoic Belt Supergroup and Cretaceous intrusive rocks.
Annotated Bibliographies of Mineral Deposits in the Western Hemisphere
Author | : John Drew Ridge |
Publsiher | : Geological Society of America |
Total Pages | : 706 |
Release | : 1972 |
Genre | : Ore deposits |
ISBN | : 9780813711317 |
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Mineral Resources of the Blacktail Mountains Wilderness Study Area Beaverhead County Montana
Author | : Russell G. Tysdal,William F. Hanna,Donald O. Capstick |
Publsiher | : Unknown |
Total Pages | : 236 |
Release | : 1988 |
Genre | : Big Horn Tack-On Wilderness (Mont. and Wyo.) |
ISBN | : OSU:32435022085047 |
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