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本帖最后由 细胞海洋 于 2012-8-3 15:08 编辑
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COVER Lake El'gygytgyn, measuring 12 kilometers in diameter and 170 ; @5 V+ X. s3 C8 u) ?
meters in depth, is located in a meteorite impact crater 100 kilometers to the 5 l I9 {2 s3 c% {( ~
north of the Arctic Circle in northeastern Russia. An international drilling
* E' G% l* [4 Y* S0 vcampaign recovered a sediment record from the bottom of the lake, which sheds
4 L y9 j, ]2 q unew light on the climate history of the Arctic over the past 2.8 million years. ! t+ G$ Q G6 [9 H
See page 315. Photo: 2 R0 b* b& k. i/ P0 B; c
Petr Tikhomirov * Z! o1 ~! ]' `. f. s- u
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发表于 2012-7-21 10:34
发表于 2012-7-22 19:51
