《科学》[Science]13年6月14日出版pdf全文

nero1981

1 k* c8 b) ^5 l/ K8 @* rCOVER Polished thin section (70 micrometers) of volcanic glass, sample
- F: J& |3 A5 b* ccatalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten 1 E0 I  V% v/ ?" [( p6 G. P0 u$ W1 y
lava erupted onto the sea floor freezes to glass and minerals that contain clues
* R& r, N6 P. U- ?7 _" Bto the lava's ancient past and origin in Earth's deep interior. Volcanic glasses
) i7 m/ W& h" U3 f4 nsuch as this one may reveal a link between Earth's oxidation state and the deep
% Q( e* V+ T% V# H& c# e# icarbon cycle. See page 1314.
" B$ [( t) b: t; X' b# CImage: G. Macpherson, T. Gooding, and E. Cottrell * j1 P) d/ q% W: C8 }6 ]$ z. T

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