georefid:2004-060787SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1130/G20182.22004-01-01publicationgeorefid:2004-060787doi:10.1130/G20182.2Sommerfield, Christopher K.University of Delaware, College of Marine Studies, Lewes, DE, United StatesauthorLee, Homa J.U. S. Geological Survey, United StatesauthorGeological Society of America (GSA), Boulder, CO, United StatespublisherdocumentHardcopyGeology (Boulder)32 (4)345-348Correlation of continental shelf-slope stratigraphy in Santa Monica Bay (southern California) with Ocean Drilling Program records for nearby slope-basin sites has illuminated the timing and scale of terrigenous sediment dispersal on margin since the Last Glacial Maximum (LGM). Marine flooding surfaces preserved in a transgressive sequence on the Santa Monica Shelf provide a key link between base-level elevation and sediment transport across shelf. Sediment-accumulation rates at slope-basin sites were maximal ca. 15-10 ka, well after the LGM, decreased during the 12-9 ka transition from fluvial-estuarine to fully marine conditions on the shelf, and decelerated throughout the Holocene to 30%-75% of their values at the LGM. The deceleration is interpreted to manifest a landward shift in the margin depocenter with the onset of transgressive sedimentation beginning when sea level surmounted the shelf edge ca. 13 ka, as predicted by sequence-stratigraphic models. However, the records make clear that factors other than base level modulated slope-basin accumulation rates during the deglaciation.completedQuaternary geologyCaliforniaCenozoiccontinental margin sedimentationcorrelationdeglaciationEast Pacificglacial geologyglaciationlast glacial maximumLeg 146Leg 167marine environmentmarine transportNorth PacificNortheast PacificOcean Drilling ProgramODP Site 1015ODP Site 1017ODP Site 893Pacific Oceanpaleo-oceanographyQuaternarySanta Barbara BasinSanta Monica BasinSanta Monica Baysea-level changessediment transportsedimentationsedimentation ratesshelf environmentslope environmentSouthern CaliforniatransgressionUnited Statesupper Quaternaryurn:org.iodp:exp:146urnlargerWorkCitationcampaignurn:org.iodp:exp:167urnlargerWorkCitationcampaignurn:org.iodp:exp:167:site:1015urnlargerWorkCitationstudyurn:org.iodp:exp:167urnlargerWorkCitationcampaignurn:org.iodp:exp:167:site:1017urnlargerWorkCitationstudyurn:org.iodp:exp:167urnlargerWorkCitationcampaignurn:org.iodp:exp:146:site:893urnlargerWorkCitationstudyurn:org.iodp:exp:146urnlargerWorkCitationcampaignEnglishgeoscientificInformation-121.0625-118.200033.425534.3205