《科学》[Science]13年5月24日出版pdf全文

nero1981

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COVER A Classopollis meyeriana conifer pollen grain (~30
" N" |. c7 _7 H. imicrometers across) preserved in lake sediments deposited just after a massive, 9 Z7 e- q5 O) K$ M% y
volcano-induced extinction event ~200 million years ago. This fossilized pollen 1 C+ c  ~4 g' T6 A
grain is representative of the low-diversity plant assemblages found within the / T- Y/ P- b9 |  o
tropics of the Pangean supercontinent during the postextinction recovery period. % ?/ n1 ~" p9 J* Q
See page 941. Image:
; M$ q: b8 x; X9 l# S4 A% r- TDee Breger and Sarah Fowell/Science Source
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