Hostname: page-component-7b7567c8c-2rsb6 Total loading time: 0 Render date: 2026-11-12T21:54:22.155Z Has data issue: false hasContentIssue false

Duration and Structure of the Past Four Interglaciations

Published online by Cambridge University Press:  20 January 2017

Isaac J. Winograd
Affiliation:
US Geological Survey, 432 National Center, Reston, Virginia, 20192
Jurate M. Landwehr
Affiliation:
US Geological Survey, 432 National Center, Reston, Virginia, 20192
Kenneth R. Ludwig
Affiliation:
Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, California, 94709
Tyler B. Coplen
Affiliation:
US Geological Survey, 432 National Center, Reston, Virginia, 20192
Alan C. Riggs
Affiliation:
USGS, Denver Federal Center, MS 413, Lakewood, Colorado, 80225

Abstract

Reanalysis and additional dating of the Devils Hole δ18O paleotemperature record confirm that the last interglaciation in the Great Basin (the continental analog of marine isotopic substage 5e) lasted ∼22,000 yr, consistent with the Vostok paleotemperature record which suggests a duration of ∼19,000 yr for this event in Antarctica. The three preceding interglaciations in the Devils Hole record (analogs of marine isotopic substages 7e, 9c, and 11c) range from 20,000 to 26,000 yr in duration. A ∼20,000-yr duration for the last interglaciation is consistent with TIMS uranium-series dated sea-level high stands. Thus, the widely held view that interglaciations were of 11,000- to 13,000-yr duration and constituted only about 10% of mid-to-late Pleistocene climatic cycles needs reexamination. The warmest portion of each interglaciation in the Devils Hole time series is marked by a δ18O plateau, signifying apparent climatic stability for periods of 10,000- to 15,000-yr duration.

Information

Type
Research Article
Copyright
University of Washington

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable