《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 ; E* f* c5 ^1 z6 i. O
micrometers across) preserved in lake sediments deposited just after a massive, , r9 [' W. U6 e; y
volcano-induced extinction event ~200 million years ago. This fossilized pollen % q5 Q  a- L' Q& H' g; U2 L
grain is representative of the low-diversity plant assemblages found within the 4 @  _) i$ X- d0 k3 H$ \5 J" h9 {
tropics of the Pangean supercontinent during the postextinction recovery period. & I  ^; C2 q+ M4 g0 _/ P! X$ g+ Q
See page 941. Image:
: O( c( y$ t0 l: mDee Breger and Sarah Fowell/Science Source
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