《科学》[Science]13年5月24日出版pdf全文

nero1981

2 b+ _- z; `: @. pCOVER A Classopollis meyeriana conifer pollen grain (~30 5 U$ ~5 m3 [1 S0 @+ k
micrometers across) preserved in lake sediments deposited just after a massive, + {' Y, L7 o4 Y" W4 f* B2 e
volcano-induced extinction event ~200 million years ago. This fossilized pollen
- K. B  S' m' y/ M, d, Vgrain is representative of the low-diversity plant assemblages found within the $ o0 p3 d& `$ U" ]
tropics of the Pangean supercontinent during the postextinction recovery period.
7 p5 |8 e  l3 o2 ~3 vSee page 941. Image:
/ D" q9 U' {6 e/ f( a8 {Dee Breger and Sarah Fowell/Science Source 6 W* i3 E. |& b$ C! |9 i* X

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