Santa Barbara County California Marine Terrace Quaternary Aminostratigraphy Rockwell, T.K.; Nolan, J.; Johnson, D.L.; Patterson, R.H.; Kennedy, G.L.; Wehmiller, J.F. Rockwell, T.K. Nolan, J. Johnson, D.L. Patterson, R.H. Kennedy, G.L. Wehmiller, J.F. earth science/paleoclimate/others (DJH-20 >LATITUDE 34.46899>LONGITUDE -120.24127) Uplifted marine terraces along the coast of California between Point Conception and Gaviota, Santa Barbara County are mapped and defined based on elevation, faunal characteristics, and amino acid racemization (AAR) data. At least five distinct terraces are recognized, ranging in elevation up to ~100 m, with likely offsets along the South Branch of the Santa Ynez Fault. The lowest two terrace platforms are assigned ages of ~80 ka and ~ 120 ka based on AAR. STUDY NOTES: Extent of Racemization (D/L) data for mollusks from Pleistocene marine terrace deposits along the California coast between Point Conception and Gaviota. Samples collected by numerous investigators, primarily K.R. Lajoie (US Geological Survey), G.L. Kennedy (USGS and Los Angeles County Museum of Natural History), J.F. Wehmiller, and R.H. Patterson (Dames and Moore). Some samples from existing USGS collections also included. Samples collected and prepared between 1975 and 1981. Samples prepared and analyzed at the University of Delaware, Newark DE, Lab PI John F. Wehmiller. Some samples shared also with P.E. Hare, Geophysical Lab, Carnegie Institution of Washington. Locality ID = formal or informal name used by collectors and maintained in U Delaware database Site name = similar to locality ID; refers to designations in Rockwell et al., 1992 Terrace number: from Rockwell et al., 1992 and Kennedy et al., 1992 All collection sites are located within the area of the Point Conception 1:100,000 US Geological Survey Topographic Map. Pretreatment: Fragments cut from shell valves; surface cleaning with dental tools; dilute HCl and distilled water wash; air dry AA fraction="amino fraction" THAA = total hydrolyzable amino acids; FAA = free amino acids (zero hydrolysis time) Hydrolysis procedure: 6N HCl 22 hours 105 deg C (for THAA only) Bleach: No Instrumental programming: GC temperature program; HPLC buffer gradient Blank corrections: no Response factors: no D/L values reported as peak height ratios Lab Code UDEL= University of Delaware; GL CIW = Geophysical Laboratory, Carnegie Institution of Washington Sample ID = identity of specific shell analyzed Analytical method: GC = gas chromatography, used for multiple amino acids; HPLC used for determination of A/I values Subsample ID = usually the same as sample ID; repeat fragments of same shell will have unique identification Ratio type = Peak Height ratios used for all results from GC; peak area ratios assumed for all results for HPLC D/L values are reported as the means of multiple chromatograms, usually at least 3. For GC results, in most cases sample derivatives were analyzed using more than one GC column. Samples selected for analysis were chosen because they appeared to be the most robust specimens among those available, In most cases, samples were not whole valves. Abraded, rounded, or chalky fragments were avoided where possible, and multiple shells from each collection were analyzed in almost all cases. Sample quality: 1 = whole valve 2 = fragment >50% 3 = fragment < 50% 4 = chalky throughout the shell 5 = robust and mechanically strong 6 = good luster A = articulated Abbreviations: A/I D-alloisoleucine/L-isoleucine Ala Alanine Asx Aspartic acid and asparagine Glx Glutamic acid and glutamine Leu Leucine Phe Phenylalanine Pro Proline Val Valine P = Protothaca S = Saxidomus M = Macoma In the "Published data summaries", mean values and number of samples may not correspond exactly to the raw data reported in the "Individual sample results" because of the way results were grouped in Rockwell et al. (1992), or because of the way analytical results have been re-evaluated. Conclusions in the original publication are not affected. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Rockwell, T.K. Investigator : Nolan, J. Investigator : Johnson, D.L. Investigator : Patterson, R.H. Investigator : Kennedy, G.L. Investigator : Wehmiller, J.F. 2012-04-20 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/12904 https://www1.ncdc.noaa.gov/pub/data/paleo/aar/rockwell1992santabarbara/rockwell1992santabarbara.txt https://www1.ncdc.noaa.gov/pub/data/paleo/aar/rockwell1992santabarbara/rockwell1992santabarbara.xls https://www1.ncdc.noaa.gov/pub/data/paleo/aar/rockwell1992santabarbara/rockwell1992santabarbara.txt https://www1.ncdc.noaa.gov/pub/data/paleo/aar/rockwell1992santabarbara/rockwell1992santabarbara.xls English https://www.ncdc.noaa.gov/paleo/study/12904 https://www1.ncdc.noaa.gov/pub/data/paleo/aar/rockwell1992santabarbara/rockwell1992santabarbara.txt https://www1.ncdc.noaa.gov/pub/data/paleo/aar/rockwell1992santabarbara/rockwell1992santabarbara.xls Rockwell, T.K., J. Nolan, D.L. Johnson, and R.H. Patterson. 1992. Ages and deformation of marine terraces between Point Conception and Gaviota, Western Transverse Ranges, California. IN: Quaternary Coasts of the United States, Marine and Lacustrine Systems. C.H. Fletcher III and J.F. Wehmiller, editors. SEPM (Society for Sedimentary Geology) Special Publication 48, pp. 333-341. START YEAR: 500000 cal yr BP * END YEAR: 1000 cal yr BP -120.24127 34.46899 -120.24127 34.46899