thumbnail

Uranium-series dating of sediments from Searles Lake: Differences between continental and marine climate records

Science

By:
, ,

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time

Abstract

One of the major unresolved questions in Pleistocene paleoclimatology has been whether continental climatic transitions are consistent with the glacial ??18O marine record. Searles Lake in California, now a dry salt pan, is underlain by sediment layers deposited in a succession of lakes whose levels and salinities have fluctuated in response to changes in climate over the last 3 ?? 106 years. Uranium-series dates on the salt beds range from 35 ?? 103 to 231 ?? 103 years. This range of dates allows identification of lake-sediment horizons that are time correlatives of the boundaries of marine isotope stages from the recent 3/4 boundary back to the 8/9 boundary. The 5/6 boundary coincided with a deepening of the lake, but the analogous 1/2 boundary coincided with desiccation. The 3/4, 4/5, 6/7, 7/8, and 8/9 boundaries correspond in age to horizons that record little or no change in sedimentation or climate. These hydrologic results demonstrate that the continental paleoclimate record at this mid-latitude site does not mimic the marine record.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Uranium-series dating of sediments from Searles Lake: Differences between continental and marine climate records
Series title:
Science
Volume
227
Issue:
4691
Year Published:
1985
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1222
Last page:
1224
Number of Pages:
3