Time-rock model for Siluro-Devonian continental shelf, western United States

Research Article| November 01, 1984 Time-rock model for Siluro-Devonian continental shelf, western United States J. G. JOHNSON; J. G. JOHNSON 1Department of Geology, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar M. A. MURPHY M. A. MURPHY 2Department of Earth Sciences, University of California, Riverside, California 92521 Search for other works by this author on: GSW Google Scholar Author and Article Information J. G. JOHNSON 1Department of Geology, Oregon State University, Corvallis, Oregon 97331 M. A. MURPHY 2Department of Earth Sciences, University of California, Riverside, California 92521 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1984) 95 (11): 1349–1359. https://doi.org/10.1130/0016-7606(1984)95<1349:TMFSCS>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation J. G. JOHNSON, M. A. MURPHY; Time-rock model for Siluro-Devonian continental shelf, western United States. GSA Bulletin 1984;; 95 (11): 1349–1359. doi: https://doi.org/10.1130/0016-7606(1984)95<1349:TMFSCS>2.0.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 carbonate shelf, shelf edge, and outer shelf basin were the sites of deposition of a facies complex that shifted in response to transgressive-regressive (T-R) cycles. In the Silurian-Lochkovian, three T-R cycles are identified, and seven are identified from mid–Lower Devonian (Pragian) to high Upper Devonian (middle Famennian). The last of these produced a thick, upward-deepening sequence truncated above by a Famennian-lower Kinderhookian hiatus, due to foreland effects of the Antler orogeny. The middle and upper members of the Pilot Shale compose an eighth cycle, which spans the Devonian-Mississippian boundary on the carbonate shelf.Most of the short-lived T-R cycles resulted from rapid deepening and progradation of the carbonate-shelf edge. Exceptions occurred during the late Early Devonian, when the carbonate-shelf edge was a ramp, and during the Taghanic and Frasnian onlaps, when transgressions are known to have been strong. The dolomite front tended to coincide approximately with the carbonate-shelf edge, but it was situated cratonward during extensive onlaps and basinward during the pre–Middle Devonian regression. 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.