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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 * ^! }) K$ |% A# b
meters in depth, is located in a meteorite impact crater 100 kilometers to the
1 M6 c/ ^( \- f+ y9 L+ w; h* x4 X; hnorth of the Arctic Circle in northeastern Russia. An international drilling / N$ Q9 u; B* e* ]. \
campaign recovered a sediment record from the bottom of the lake, which sheds
; O: z% f2 x6 g2 znew light on the climate history of the Arctic over the past 2.8 million years.
& @% W. n% Y/ E. [6 W# \; O+ BSee page 315. Photo:
. @% q* v" S* U& Y$ IPetr Tikhomirov ; l! J* @, r! R' Y0 {
/ d, l$ A6 Z* v[hide][/hide] |
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发表于 2012-7-21 10:34
