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Roberts Mountains allochthon and the western margin of the Cordilleran miogeocline in the Northern Ritter Range pendant, eastern Sierra Nevada, California

1997; Geological Society of America; Volume: 109; Issue: 10 Linguagem: Inglês

10.1130/0016-7606(1997)109 2.3.co;2

1943-2674

D. Greene, Richard A. Schweickert, Calvin H. Stevens,

Geochemistry and Geologic Mapping

Research Article| October 01, 1997 Roberts Mountains allochthon and the western margin of the Cordilleran miogeocline in the Northern Ritter Range pendant, eastern Sierra Nevada, California David C. Greene; David C. Greene 1Department of Geology and Geography, Denison University, Granville, Ohio 43023 Search for other works by this author on: GSW Google Scholar Richard A. Schweickert; Richard A. Schweickert 2Department of Geological Sciences, University of Nevada, Reno, Nevada 89557 Search for other works by this author on: GSW Google Scholar Calvin H. Stevens Calvin H. Stevens 3Department of Geology, San Jose State University, San Jose, California 95192 Search for other works by this author on: GSW Google Scholar Author and Article Information David C. Greene 1Department of Geology and Geography, Denison University, Granville, Ohio 43023 Richard A. Schweickert 2Department of Geological Sciences, University of Nevada, Reno, Nevada 89557 Calvin H. Stevens 3Department of Geology, San Jose State University, San Jose, California 95192 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1997) 109 (10): 1294–1305. https://doi.org/10.1130/0016-7606(1997)109 2.3.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation David C. Greene, Richard A. Schweickert, Calvin H. Stevens; Roberts Mountains allochthon and the western margin of the Cordilleran miogeocline in the Northern Ritter Range pendant, eastern Sierra Nevada, California. GSA Bulletin 1997;; 109 (10): 1294–1305. doi: https://doi.org/10.1130/0016-7606(1997)109 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The truncated southwestern edge of the Roberts Mountains allochthon is exposed in the Northern Ritter Range pendant in the eastern Sierra Nevada, structurally overlying parautochthonous rocks of the Cordilleran miogeocline. The Northern Ritter Range pendant exposes units that have the same stratigraphic affinities and structural relationships as rocks of the Antler orogenic belt in Nevada.Paleozoic metasedimentary rocks exposed in the pendant consist of two major units: (1) a structurally complex, disrupted chert and argillite unit interpreted to be correlative with the Roberts Mountains allochthon; and (2) a stratigraphically coherent siliceous and calcareous unit, the Rush Creek sequence, that is interpreted to be part of a transitional outer shelf and slope assemblage of the lower Paleozoic Cordilleran miogeocline. In the Northern Ritter Range pendant, the Roberts Mountains allochthon structurally overlies the Rush Creek sequence along a north-striking, steeply dipping fault zone that may be a preserved remnant of the Roberts Mountains thrust, which in north-central Nevada emplaced the allochthon over outer shelf and slope strata of the Cordilleran miogeocline during the Late Devonian–Early Mississippian Antler orogeny.These stratigraphic and structural belts are truncated on the southwest side of the pendant by the Gem Lake shear zone, a northwest-trending dextral strike-slip fault associated with the Cretaceous Sierra Nevada batholith. The Northern Ritter Range pendant thus defines both the southwestern limit of the Antler orogenic belt and the westernmost exposures of parautochthonous miogeoclinal rocks in the central Cordillera. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.