The Eastern Front of the Bitterroot Range, Montana

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From abstract: The origin of the gneissic rocks on the eastern border of the Idaho batholith in the Bitterroot Range, near Hamilton, Mont., has long been in dispute. Lindgren regarded these rocks as the product of stresses related to a normal fault along the front of the range with an eastward dip of about 150. He thought both the hanging wall and the footwall had moved, with a total displacement along the fault plane of at least 20,000 feet. The faulting was believed to have been so recent as to be a major factor in the present topography. Langton appears … continued below

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[50] p. : ill., map, charts, photographs ; 27 cm.

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Ross, Clyde P. 1952.

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Description

From abstract: The origin of the gneissic rocks on the eastern border of the Idaho batholith in the Bitterroot Range, near Hamilton, Mont., has long been in dispute. Lindgren regarded these rocks as the product of stresses related to a normal fault along the front of the range with an eastward dip of about 150. He thought both the hanging wall and the footwall had moved, with a total displacement along the fault plane of at least 20,000 feet. The faulting was believed to have been so recent as to be a major factor in the present topography. Langton appears to accept the concept of faulting but to regard the gneissic rocks as formed much earlier from a granitic rock that was more silicic and older than the Idaho batholith.

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[50] p. : ill., map, charts, photographs ; 27 cm.

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  • OCLC: 885009160
  • SuDoc Number: I 19.3:974-E
  • Report No.: USGS Bulletin 974-E
  • Archival Resource Key: ark:/67531/metadc304413

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Technical Report Archive and Image Library

The Technical Report Archive & Image Library (TRAIL) identifies, acquires, catalogs, digitizes and provides unrestricted access to U.S. government agency technical reports. The mission of TRAIL is to ensure preservation, discoverability, and persistent open access to government technical publications regardless of form or format.

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  • 1952

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  • March 15, 2017, 12:42 p.m.

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  • Jan. 11, 2018, 2:19 p.m.

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Ross, Clyde P. The Eastern Front of the Bitterroot Range, Montana, report, 1952; Washington D.C. (https://digital.library.unt.edu/ark:/67531/metadc304413/: accessed December 10, 2023), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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