《科学》[Science]13年5月24日出版pdf全文

nero1981

+ o, G& \7 F9 J% V% _COVER A Classopollis meyeriana conifer pollen grain (~30
* T0 a$ a$ l5 gmicrometers across) preserved in lake sediments deposited just after a massive, 5 Q  b+ g3 b4 V" c% H% P8 w. g+ C' V
volcano-induced extinction event ~200 million years ago. This fossilized pollen - a) m9 K' A. y; b" J4 M
grain is representative of the low-diversity plant assemblages found within the   p8 q5 {1 n5 E* @, l" V
tropics of the Pangean supercontinent during the postextinction recovery period. 8 H" s# b# J7 s7 r9 V. L: B6 e
See page 941. Image:
6 D. A+ W: U5 _, T* ?Dee Breger and Sarah Fowell/Science Source
! E+ c5 @  F  V7 @& z1 I1 R2 b# @$ o

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