{"NOAAStudyId":"10334","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2010-12-30","dataPublisher":"NOAA","dataType":"PALEOCEANOGRAPHY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-10334.xml","doi":null,"earliestYearBP":30185,"earliestYearCE":-28235,"entryId":"noaa-ocean-10334","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-0526278, OCE-0753487"},{"fundingAgency":"Gordon and Betty Moore Foundation","fundingGrant":null}],"investigators":"Muratli, J.M.; Chase, Z.; McManus, J.F.; Mix, A.C.","mostRecentYearBP":155,"mostRecentYearCE":1795,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/10334","originalSource":null,"publication":[{"abstract":"Bulk sediment chemistry from three Chilean continental margin \nOcean Drilling Program sites constrains regional continental \nerosion over the past 30,000 years. Sediments from thirteen \nrivers that drain the (mostly igneous) Andes and the (mostly \nmetamorphic) Coast Range, along with existing rock chemistry\ndatasets, define terrestrial provenance for the continental \nmargin sediments. Andean river sediments have high Mg/Al \nrelative to Coast-Range river sediments. Near 36°S, \nmarine sediments have high-Mg/Al (i.e. more Andean) sources \nduring the last glacial period, and lower-Mg/Al (less Andean) \nsources during the Holocene. Near 41°S a Ti-rich source, \nlikely from coast-range igneous intrusions, is prevalent \nduring Holocene time, whereas high-Mg/Al Andean sources \nare more prevalent during the last glacial period.\nWe infer that there is a dominant ice-sheet control of sediment \nsources. At 36°S, Andean-sourced sediment decreased as Andean \nmountain glaciers retreated after ~17.6 ka, coincident with \nlocal oceanic warming and southward retreat of the Patagonian \nForest and, by inference, westerly winds. At 41°S Andean sediment \ndominance peaks and then rapidly declines at ~19 ka, coincident \nwith local oceanic warming and the earliest deglacial sea-level \nrise. We hypothesize that this decreased flux of Andean material \nin the south is related to rapid retreat of the marine-based \nportion of the Patagonian Ice Sheet in response to global \nsea-level rise, as the resulting flooding of the southern portion \nof the Central Valley created a sink for Andean sediments in this \nregion. Reversal of the decreasing deglacial Mg/Al trend at 41°S \nfrom 14.5 to 13.0 ka is consistent with a brief re-advance of the \nPatagonian ice sheet coincident with the Antarctic Cold Reversal.\n","author":null,"citation":"Muratli, J.M., Z. Chase, J. McManus, and A. Mix. 2010. \nIce-sheet control of continental erosion in central \nand southern Chile (36°-41°S) over the last 30,000 years.  \nQuaternary Science Reviews, Vol. 29, Issues 23-24, \npp. 3230-3239, November 2010.  doi:10.1016/j.quascirev.2010.06.037\n","edition":null,"identifier":{"id":"10.1016/j.quascirev.2010.06.037","type":"doi","url":"http://dx.doi.org/10.1016/j.quascirev.2010.06.037"},"issue":null,"journal":"Quaternary Science Reviews","pages":null,"pubRank":"1","pubYear":2010,"reportNumber":null,"title":"Ice-sheet control of continental erosion in central  and southern Chile (36°-41°S) over the last 30,000 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