Title

A High-Resolution Record of Holocene Climate Change in Speleothem Calcite from Cold Water Cave, Northeast Iowa

Document Type

Article

Peer Reviewed

1

Publication Date

12-1-1992

Journal/Book/Conference Title

Science

DOI of Published Version

10.1126/science.258.5088.1626

Start Page

1626

End Page

1630

Abstract

High-precision uranium-thorium mass spectrometric chronology and $^{18}$O-$^{13}$C isotopic analysis of speleothem calcite from Cold Water Cave in northeast lowa have been used to chart mid-Holocene climate change. Significant shifts in $\delta^{18}$O and $\delta^{13}$C isotopic values coincide with well-documented Holocene vegetation changes. Temperature estimates based on $^{18}$O/$^{16}$O ratios suggest that the climate warmed rapidly by about 3°C at 5900 years before present and then cooled by 4°C at 3600 years before present. Initiation of a gradual increase in $\delta^{13}$C at 5900 years before present suggests that turnover of the forest soil biomass was slow and that equilibrium with prairie vegetation was not attained by 3600 years before present.

Published Article/Book Citation

Science, 258:5088 (1992) pp. 1626-1630.

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URL

https://ir.uiowa.edu/geology_pubs/124