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Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 4 pages
File Size : 43,6 Mb
Release : 1996
Category : Earth sciences
ISBN : UCR:31210010685285
Author : Anonim
Publisher : Unknown
Page : 6 pages
File Size : 47,8 Mb
Release : 1995
Category : Earth sciences
ISBN : UCR:31210022272312
Author : Ren Jen Sun,John B. Weeks
Publisher : Unknown
Page : 100 pages
File Size : 50,7 Mb
Release : 1991
Category : Aquifers
ISBN : UCR:31210025296755
Author : Geological Survey (U.S.). Geologic Division,Margaret E. Hinkle,Wayne B. Solley,Edith B. Chase,Robert E. Davis
Publisher : Unknown
Page : 354 pages
File Size : 49,9 Mb
Release : 1983
Category : Arid regions
ISBN : OSU:32435064438278
Author : Anonim
Publisher : Unknown
Page : 472 pages
File Size : 46,5 Mb
Release : 1984
Category : Geology
ISBN : MINN:31951P00161021N
Author : Anonim
Publisher : Unknown
Page : 28 pages
File Size : 48,9 Mb
Release : 1983
Category : Geology
ISBN : RUTGERS:39030041194343
Author : Anonim
Publisher : Unknown
Page : 874 pages
File Size : 45,6 Mb
Release : 1982
Category : Water-supply
ISBN : NYPL:33433116700224
Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 92 pages
File Size : 45,9 Mb
Release : 1987
Category : Geology
ISBN : UCR:31210024716019
Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 100 pages
File Size : 40,5 Mb
Release : 1995
Category : Geology
ISBN : MINN:31951D00268938C
Author : Anonim
Publisher : Unknown
Page : 384 pages
File Size : 40,7 Mb
Release : 1984
Category : Geology
ISBN : WISC:89042343350
Author : Anonim
Publisher : Unknown
Page : 616 pages
File Size : 52,7 Mb
Release : 1998
Category : Geology
ISBN : MINN:31951P009750182
Author : Arthur Edward Nelson,James George Evans,Thomas Llewellyn Wright,Margaret T. Mangan,Donald Alan Swanson
Publisher : Unknown
Page : 280 pages
File Size : 54,6 Mb
Release : 1983
Category : Basalt
ISBN : OSU:32435022084438
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.
Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 4 pages
File Size : 44,6 Mb
Release : 1996
Category : Earth sciences
ISBN : UCR:31210010692018
Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 8 pages
File Size : 50,5 Mb
Release : 1996
Category : Earth sciences
ISBN : MINN:31951D01547735E
Author : Geological Survey (U.S.)
Publisher : Unknown
Page : 4 pages
File Size : 48,7 Mb
Release : 1996
Category : Earth sciences
ISBN : UCR:31210010685319
