Reports

Continental Pleistocene Climatic Variations from Speleothem Age and Isotopic Data

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Science  24 May 1974:
Vol. 184, Issue 4139, pp. 893-895
DOI: 10.1126/science.184.4139.893

Abstract

Speleothems from continental North American caves have been dated by means of the 230Th/234U method. Oxygen isotopic variations in the dated samples and phases of speleothem deposition can be interpreted in terms of climatic change. A glacial chronology constructed from the age and isotopic data lends support to the astronomical theory of climatic change.