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Glaciation in Southern Argentina More than Two Million Years Ago
J. H. Mercer
New Series, Vol. 164, No. 3881 (May 16, 1969), pp. 823-825
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1726687
Page Count: 3
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In southern Argentina till beds interbedded with lava flows were deposited by ice that extended at least 40 kilometers east of the present crest of the cordillera. The flow covering the oldest till bed is 3.2 ± 1 million years old. The flow that constitutes the present surface and covers the youngest till bed, is 1.7 ± 0.5 million years old.
Science © 1969 American Association for the Advancement of Science