Barron et al. 2005 High Resolution Guaymas Basin Diatom and Silicoflagellate Data Barron, J.A.; Bukry, D.; Dean, W.E. Barron, J.A. Bukry, D. Dean, W.E. earth science/paleoclimate/paleocean (GGC55>LATITUDE 27.47>LONGITUDE -112.1) Sediments deposited on the western slope of the Guaymas Basin in the central Gulf of California are composed predominantly of detrital clastic material and biogenic silica (biopal), with minor organic material (average of 2.8% organic carbon) and calcium carbonate. The CaCO3 is derived from calcareous plankton and is highly variable ranging from 0% to 16%. In general, the CaCO3 content of the sediments varies inversely with the biopal content, reflecting the relative abundance of calcareous and siliceous plankton in the photic zone. Siliceous plankton dominate when winds are predominantly out of the northwest producing strong upwelling. Calcareous plankton indicates weak southeasterly winds that bring warm, tropical Pacific surface water into the Gulf. Based mainly on relative abundances of biopal and CaCO3, the sediments deposited over the last 17,000 years in the western Guaymas Basin can be divided into five intervals. In general, the sediments in the intervals with high biopal and low CaCO3 are laminated, but this is not always true. Unlike most other continental margins of the world with well-developed oxygen minimum zones where highest concentrations of organic carbon and redox-sensitive trace metals occur in laminated sediments, the laminated sediments on the anoxic slope of the western Guaymas Basin do not always have the highest concentrations of organic carbon and trace metals such as Mo and Cd. STUDY NOTES: Guaymas Basin High-resolution Diatom and Silicoflagellate Data. Samples are from piston core JC56 and nearby gravity core GGC-55 (27 28.22'N, 112 6.33'W; 820 m water depth) The chronology for GGC55 and JPC56 is after Keigwin (2002), who recalibrated the results of Pride et al. (1999) using the revised reservoir correction of 725 years (BR =395 years) for the central Gulf. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Barron, J.A. Investigator : Bukry, D. Investigator : Dean, W.E. 2005-08-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/5915 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/barron2005/barron2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/barron2005/barron2005.txt English https://www.ncdc.noaa.gov/paleo/study/5915 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/barron2005/barron2005.txt John A. Barron, David Bukry, Walter E. Dean2005Paleoceanographic history of the Guaymas Basin, Gulf of California, during the past 15,000 years based on diatoms, silicoflagellates, and biogenic sedimentsMarine Micropaleontology563-481-10210.1016/j.marmicro.2005.04.001http://www.sciencedirect.com/science/article/pii/S0377839805000356 Lloyd D. Keigwin2002Late Pleistocene-Holocene Paleoceanography and Ventilation of the Gulf of CaliforniaJournal of Oceanography582421-43210.1023/A:1015830313175http://link.springer.com/article/10.1023/A%3A1015830313175 Walter E. Dean2006The geochemical record of the last 17,000 years in the Guaymas Basin, Gulf of CaliforniaChemical Geology2323-487-9810.1016/j.chemgeo.2006.02.017http://www.sciencedirect.com/science/article/pii/S000925410600129X START YEAR: 14840 cal yr BP * END YEAR: 2200 cal yr BP -112.1 27.47 -112.1 27.47