《科学》[Science]13年5月24日出版pdf全文

nero1981

% ^* t3 ~' h  C8 xCOVER A Classopollis meyeriana conifer pollen grain (~30 7 P, C" V5 j! V0 O9 P( R4 m; E
micrometers across) preserved in lake sediments deposited just after a massive,
9 @4 Y3 t1 X8 d# @volcano-induced extinction event ~200 million years ago. This fossilized pollen / u" Z& P1 Y7 m8 b5 H7 [
grain is representative of the low-diversity plant assemblages found within the
5 @' e) d1 V' w! ?, Otropics of the Pangean supercontinent during the postextinction recovery period. 8 N9 l- g% c- P$ \0 j5 h9 |
See page 941. Image: . `3 r: ]1 Z) R* R! s
Dee Breger and Sarah Fowell/Science Source
  L- I! s* o( \0 T7 J+ D; s

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