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Sirenian Enamel d 13 C and d 18 O Values: Differences with Latitude and Age

Sirenian Enamel d 13 C and d 18 O Values: Differences with Latitude and Age. Mark T. Clementz, Department of Geology & Geophysics, University of Wyoming, Laramie, WY 82071. Oxygen Isotope Values Paleogene & Neogene – Significant difference detected between low and high latitudes

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Sirenian Enamel d 13 C and d 18 O Values: Differences with Latitude and Age

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  1. Sirenian Enamel d13C and d18O Values: Differences with Latitude and Age Mark T. Clementz, Department of Geology & Geophysics, University of Wyoming, Laramie, WY 82071 • Oxygen Isotope Values • Paleogene & Neogene – Significant difference detected between low and high latitudes • Neogene – The magnitude of offset between low and high latitudes greater than that for the Paleogene • Carbon Isotope Values • Paleogene – No significant difference detected between low and high latitudes • Neogene – Significant difference with latitude; may indicate increase in marine-freshwater mixing or changes in seawater DIC d13C values

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