《科学》[Science]13年6月14日出版pdf全文

nero1981

+ T5 W$ y, V1 _# ~COVER Polished thin section (70 micrometers) of volcanic glass, sample
2 v8 \3 ^4 g; L4 T9 y2 T9 G( vcatalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten , k) v$ \7 a9 t5 |4 d4 r' g, H
lava erupted onto the sea floor freezes to glass and minerals that contain clues % C  J/ h2 `" u. X# B9 ^1 M8 N
to the lava's ancient past and origin in Earth's deep interior. Volcanic glasses
+ T8 r  `; N( hsuch as this one may reveal a link between Earth's oxidation state and the deep + Y4 x/ e: B) a/ W+ M7 w6 z
carbon cycle. See page 1314. 3 s! F8 w% ]  N( ^& L
Image: G. Macpherson, T. Gooding, and E. Cottrell 8 b: D1 Z; D& `3 a# K

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