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Stable isotope enrichment in paleowaters of the southeast Atlantic coastal plain, United States

Science

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Abstract

Paleowaters from the Floridan aquifer system in the southeastern Atlantic coastal plain have higher D/H and 18O/16O ratios than local Holocene ground water. Maximum ??18O enrichments in ground water having adjusted radiocarbon ages of 20,000 to 26,000 years are 0.7 to 2.3 per mil. The trend in isotopic enrichment in paleowaters is the reverse of that normally observed in continental glacial age ground water. Dissolved nitrogen and argon concentrations indicate, however, that the average recharge temperature was 5.3??C cooler than that today. The data indicate cool conditions in the southeast Atlantic coastal plain during the last glacial maximum, with recharge limited primarily to late summer tropical cyclones and hurricanes.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Stable isotope enrichment in paleowaters of the southeast Atlantic coastal plain, United States
Series title:
Science
Volume
262
Issue:
5142
Year Published:
1993
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
2016
Last page:
2020
Number of Pages:
5