Late Neogene-Quaternary left slip on N-striking faults, SE Nevada-SW Utah area: An event distinct from Miocene WSW-directed major extension
- CICESE, San Diego, CA (United States)
Much strike-slip faulting, on [approximately]NW-striking dextral and [approximately]NE-striking sinistral faults, was synchronous with large-magnitude extension in the Great Basin (e.g., Wernicke and others 1988, GSA Bulletin). However, in the SE Nevada area major Miocene extension ([approximately]100 km WSW extension) was followed by sinistral slip on several [approximately]N-striking faults. These faults have moderate to steep dips, cut all structures that intersect them, control range-scale topography, are typically >10 km long, and some cut Pliocene-Quaternary deposits. These data conflict with the idea that the N-striking sinistral faults were coeval with Miocene-Recent normal faulting that produced only minor extension in the SE Nevada area ([approximately]10%; Anderson and Barnhard, ref. above). However, they are consistent with seismic (Bohannon and others in press, GSA Bulletin) and numerous geologic studies documenting large-magnitude Miocene extension, and also suggest a Pliocene-Recent episode of sinistral slip on N-trending faults coeval with slowed Pliocene-Recent extension.
- OSTI ID:
- 5437408
- Report Number(s):
- CONF-9305259-; CODEN: GAAPBC
- Journal Information:
- Geological Society of America, Abstracts with Programs; (United States), Vol. 25:5; Conference: 89. annual meeting of the Cordilleran Section and the 46th annual meeting of the Rocky Mountain Section of the Geological Society of America (GSA), Reno, NV (United States), 19-21 May 1993; ISSN 0016-7592
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GEOLOGIC FAULTS
GEOLOGIC HISTORY
GEOLOGY
NEVADA
UTAH
AGE ESTIMATION
DEFORMATION
GEOMETRY
MAPPING
ORIENTATION
QUATERNARY PERIOD
TECTONICS
TERTIARY PERIOD
CENOZOIC ERA
DEVELOPED COUNTRIES
GEOLOGIC AGES
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
MATHEMATICS
NORTH AMERICA
USA
580000* - Geosciences