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Science 3 April 1981:
Vol. 212. no. 4490, pp. 43 - 45
DOI: 10.1126/science.212.4490.43
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Articles

Calibration of the Beginning of the Age of Mammals in Patagonia

LARRY G. MARSHALL 1, ROBERT F. BUTLER 2, ROBERT E. DRAKE 3, and GARNISS H. CURTIS 3

1 Department of Geology, Field Museum of Natural History, Chicago, Illinois 60605
2 Department of Geosciences, University of Arizona, Tucson 85721
3 Department of Geology and Geophysics, University of California, Berkeley 94720

Beds of the Rio Chico Formation containing the earliest known land mammals in Patagonia, southern Argentina, were calibrated by potassium-argon age determinations and paleomagnetic polarity data. The Riochican land mammal age encompasses the middle and late Paleocene and corresponds in time with Torrejonian and Tiffanian land mammal faunas in North America.

Submitted on July 10, 1980
Revised on November 24, 1980


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs.
A. Iglesias, P. Wilf, K. R. Johnson, A. B. Zamuner, N. R. Cuneo, S. D. Matheos, and B. S. Singer (2007)
Geology 35, 947-950
   Abstract »    Full Text »    PDF »
Geochronology of Type Uquian (Late Cenozoic) Land Mammal Age, Argentina.
L. G. Marshall, L. G. MARSHALL, R. F. BUTLER, R. E. DRAKE, and G. H. CURTIS (1982)
Science 216, 986-989
   Abstract »    PDF »


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