两百万年前的阿根廷南部冰川作用。

Glaciation in southern Argentina more than two million years ago.

出版信息

Science. 1969 May 16;164(3881):823-5. doi: 10.1126/science.164.3881.823.

DOI:10.1126/science.164.3881.823

Abstract

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.

摘要

在阿根廷南部，直到冰床与熔岩流互层才沉积下来，这些冰床至少向东延伸到现今山脉脊线以东 40 公里处。覆盖最古老冰碛床的熔岩流有 320 万年 ± 10 万年历史。而构成现今地表并覆盖最年轻冰碛床的熔岩流则有 170 万年 ± 5 万年历史。