阿根廷巴塔哥尼亚东北部中新世海洋里尼奥内格罗地层的第一个放射性同位素（钾-氩）年龄。

First radioisotope (potassium-argon) age of marine neogene rionegro beds in northeastern patagonia, Argentina.

出版信息

Science. 1981 Apr 24;212(4493):440. doi: 10.1126/science.212.4493.440.

DOI: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.

摘要

从阿根廷新湾的卡顿角海洋里尼奥格伦塞上部凝灰岩的三个玻璃浓缩物的放射性同位素（钾-氩）年龄测定中，得出了一个平均年龄为 941 万年。这个年龄与欧洲的托尔顿海洋阶段和南美洲的查西科陆地哺乳动物时代相对应。