First Radioisotope (Potassium-Argon) Age of Marine Neogene Rionegro Beds in Northeastern Patagonia, Argentina

24 April 1981

journal article
research article
Published by American Association for the Advancement of Science (AAAS) in Science

Vol. 212 (4493) , 440
https://doi.org/10.1126/science.212.4493.440

Abstract

An average age of 9.41 million years was obtained from radioisotope (potassium-argon) age determinations of three glass concentrates of a tuff from the upper part of the marine Rionegrense at Punta Cracker in Golfo Nuevo, Argentina. This age correlates with the Tortonian marine stage of Europe and the Chasicoan Land Mammal Age of South America.

Keywords

BETA DECAY
ALKALI METALS
LATIN AMERICA
POTASSIUM
DEVELOPING COUNTRY

This publication has 2 references indexed in Scilit:

Calibration of the Great American Interchange
Science, 1979
South American Geochronology: Radiometric Time Scale for Middle to Late Tertiary Mammal-Bearing Horizons in Patagonia
Science, 1977