{"NOAAStudyId":"13298","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":"2012-07-27","dataPublisher":"NOAA","dataType":"OTHER COLLECTIONS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/other-collections","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-other-13298.xml","doi":null,"earliestYearBP":1000000,"earliestYearCE":-998050,"entryId":"noaa-other-13298","funding":[{"fundingAgency":"US Geological Survey","fundingGrant":null},{"fundingAgency":"US National Science Foundation","fundingGrant":null}],"investigators":"Riggs, S.R.; York, L.L.; Wehmiller, J.F.; Snyder, S.W.","mostRecentYearBP":0,"mostRecentYearCE":1950,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13298","originalSource":null,"publication":[{"abstract":"Amino acid enantiomeric ratio data are presented for Pleistocene \r\nmollusks obtained from a suite of split-spoon and vibracore samples \r\nat sites in Dare County, northeastern North Carolina. The region \r\nlies within the Albemarle Embayment, a thick sequence of Quaternary \r\nand pre-Quaternary strata in the mid-Atlantic coastal plain, \r\neastern United States. Land surface elevations range from 0 to +2 m. \r\nSample depths range from ~ 4 meters to ~ 35 m below mean sea level. \r\nSpecimens of the bivalve mollusk Mulinia and Mercenaria have \r\nbeen analyzed by ion-exchange and gas chromatography. \r\nAminozones representing clusters of D/L values are used to correlate \r\ndepositional sequences in the study area and to estimate times \r\nof deposition based on kinetic modeling of amino acid racemization. \r\nDeepest units are estimated to be older than 1 million years, \r\nwhile the shallowest Pleistocene units are estimated to be last \r\ninterglacial (~80,000 - 125,000 yrs) in age, based on both \r\nracemization and uranium-thorium age estimates. ","author":null,"citation":"Riggs, S.R., L.L. York, J.F. Wehmiller, and S.W. Snyder. 1992. \r\nDepositional patterns resulting from high-frequency Quaternary \r\nsea-level fluctuations in northeastern North Carolina. \r\nIn: Fletcher, C. H. III and Wehmiller, J. F. (Eds.). \r\nQuaternary Coasts of the United States: Marine and Lacustrine Systems. \r\nSociety of Economic Paleontologists and Mineralogists \r\nSpecial Publication 48, p. 155-160. ","edition":null,"identifier":null,"issue":null,"journal":"SEPM (Society for Sedimentary Geology)","pages":null,"pubRank":"1","pubYear":1992,"reportNumber":null,"title":"Depositional patterns resulting from high-frequency Quaternary  sea-level fluctuations in northeastern North Carolina","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"54020","geo":{"geoType":"Feature","geometry":{"coordinates":["35.865","-75.858"],"type":"POINT"},"properties":{"easternmostLongitude":"-75.858","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"35.865","southernmostLatitude":"35.865","westernmostLongitude":"-75.858"}},"locationName":"Continent>North America>United States Of America>North Carolina","mappable":"Y","paleoData":[{"NOAADataTableId":"23020","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/aar/riggs1992dare/riggs1992dare.txt","linkText":"riggs1992dare.txt","urlDescription":"Data","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/aar/riggs1992dare/riggs1992dare.xls","linkText":"riggs1992dare.xls","urlDescription":"Data","variables":[]}],"dataTableName":"LY85-221A","dataTableNotes":null,"earliestYear":1000000,"earliestYearBP":1000000,"earliestYearCE":-998050,"mostRecentYear":0,"mostRecentYearBP":0,"mostRecentYearCE":1950,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Stetson Pit"}],"studyCode":null,"studyName":"Dare County, North Carolina Quaternary Subsurface Aminostratigraphy","studyNotes":"Extent of Racemization (D/L) data for mollusks from Pleistocene \ncoastal units, subsurface sections of the Atlantic Coastal Plain, \nDare County, North Carolina. \n\nSamples collected by L.L. York, S.R. Riggs, W. Miller III, \nand T.M. Cronin. Samples collected in 1970's and 1980's \nby vibracoring, excavation (Stetson Pit), and split-spoon \ndrilling (Stetson Pit). \n\n\nSamples prepared and analyzed at the University of Delaware, \nNewark DE. [UDEL].  Lab PI John F. Wehmiller. \n\n\nPretreatment: Fragments cut from shell valves; surface cleaning \nwith dental tools; dilute HCl and distilled water wash; air dry \nAA fraction=\"amino fraction\" \nTHAA = total hydrolyzable amino acids; \nFAA = free amino acids (zero hydrolysis time) \nHydrolysis procedure: 6N HCl 22 hours 105 deg C (for THAA only) \nBleach: No \nInstrumental programming: GC temperature program; HPLC buffer gradient \nBlank corrections: no \nResponse factors: no \n\nLab Code UDEL= University of Delaware \n\nSample ID = identity of specific shell analyzed \nAnalytical method: GC = gas chromatography, used for multiple amino acids; \nIon-exchange High Pressure Liquid Chromatography used for determination \nof A/I values  (HPLC) \nSubsample ID =  usually the same as sample ID; repeat fragments of same \nshell will have unique identification \nRatio type =  (peak area or peak height ratios) \n\n\nD/L values are reported as the means of multiple chromatograms, \nusually at least 2. For GC results, in most cases sample derivatives \nwere analyzed using more than one GC column. \n\nSamples selected for analysis were chosen because they appeared \nto be the most robust specimens among those available.  In most cases, \nsamples were not whole valves.  Abraded, rounded, or chalky fragments \nwere avoided where possible, and multiple shells from each collection \nwere analyzed in almost all cases.  No data screening procedures have \nbeen applied. No interlab sample comparisons were made during \nthe period of these analyses. \n\nInformation on sample quality (fragment, whole shell, abraded, chalky, etc. \nwill be compiled for a future version of this datafile. \n\nAbbreviations: \n\nA/I     D-alloisoleucine/L-isoleucine \nAla     Alanine \nAsx     Aspartic acid and asparagine \nGlx     Glutamic acid and glutamine \nLeu     Leucine \nPhe     Phenylalanine \nPro     Proline \nVal     Valine \n\n9999 = no data available for this amino acid in this sample \n\n\nUDAMS LOCALITY DESIGNATIONS  (UDAMS = UDAMinoStratigraphy) \n\n07002\tExcavation in 1981-1982 (W. Miller to T. M. Cronin to J. Wehmiler)  Surface elevation ~ 2m \n07004\tExcavation in 1981-1982 (W. Miller to T. M. Cronin to J. Wehmiler)  Surface elevation ~ 2m \n07005\tCore taken in 1982 (Miller, 1982). Top of core at ~ 0 m elevation \n07077\tCore taken in 1982 (Miller, 1982). Top of core at ~ 0 m elevation \n07127\tCore taken in 1982 (Miller, 1982). Top of core at ~ 0 m elevation \n07128\tSamples from original excavation in early 1980's. \n\n","version":"1.0","xmlId":"11339"}