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500,000-year stable carbon isotopic record from Devils Hole, Nevada

Science

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Abstract

The record of carbon-13 (??13C) variations in DH-11 vein calcite core from Devils Hole, Nevada, shows four prominent minima near glacial terminations (glacial-interglacial transitions) V to II. The ??13C time series is inversely correlated with the DH-11 oxygen isotope ratio time series and leads it by as much as 7000 years. The ??13C variations likely record fluctuations in the ??13C of dissolved inorganic carbon of water recharging the aquifer. How such variations are transported 80 kilometers to Devils Hole without obliteration by waterrock reaction remains an enigma. The record may reflect (i) global variations in the ??13C of atmospheric CO2 and, hence, the ??13C of continental biomass or (ii) variations in extent and density of vegetation in the southern Great Basin. In the latter case, ??13C minima at 414, 334, 246, and 133 thousand years ago mark times of maximum vegetation.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
500,000-year stable carbon isotopic record from Devils Hole, Nevada
Series title:
Science
Volume
263
Issue:
5145
Year Published:
1994
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
361
Last page:
365
Number of Pages:
5