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Nested Submarine-Fan Channels in the Capistrano Formation, San Clemente, California

1975; Geological Society of America; Volume: 86; Issue: 7 Linguagem: Inglês

10.1130/0016-7606(1975)86 2.0.co;2

1943-2674

Roger G. Walker,

Coastal and Marine Dynamics

Research Article| July 01, 1975 Nested Submarine-Fan Channels in the Capistrano Formation, San Clemente, California ROGER G. WALKER ROGER G. WALKER 1Department of Geology, McMaster University, Hamilton, Ontario L8S 4M1, Canada Search for other works by this author on: GSW Google Scholar GSA Bulletin (1975) 86 (7): 915–924. https://doi.org/10.1130/0016-7606(1975)86 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 ROGER G. WALKER; Nested Submarine-Fan Channels in the Capistrano Formation, San Clemente, California. GSA Bulletin 1975;; 86 (7): 915–924. doi: https://doi.org/10.1130/0016-7606(1975)86 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 At San Clemente State Beach, eight turbidite-filled channels are exposed in a 550-m-long, 30-m-high sea cliff. The channel margins show a progressive northwestward lateral shift in position and thus are nested one alongside another. Three adjacent channels trend between 270° and 300°, with west-northwest turbidity-current flow. Four other adjacent channels trend between 230° and 240°, with southwest flow. Seven of the eight channels received mud and silt deposits in the form of a drape over the channel walls before deposition of graded sand beds took place. In some channels, these graded beds belong to the "classical" turbidite facies, but in others, the sandstone deposits are pebbly, beds are thick, and interbeds of shale are thin to absent. In three of the channels, there is an overall upward fining and thinning of beds, implying progressive channel abandonment. By contrast, the beds filling one channel become coarser and thicker upward, implying a prograding turbidite lobe. The channels are assigned to the braided suprafan part of the submarine-fan model. 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.