《科学》[Science]13年6月14日出版pdf全文

nero1981

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COVER Polished thin section (70 micrometers) of volcanic glass, sample / p& }% |' k; H$ w! G$ \
catalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten
1 Q! T4 Z- k7 Q# `! Zlava erupted onto the sea floor freezes to glass and minerals that contain clues
. o0 b, r* e+ f9 S2 H2 o& Rto the lava's ancient past and origin in Earth's deep interior. Volcanic glasses + n0 d& N$ E7 M
such as this one may reveal a link between Earth's oxidation state and the deep + v$ Z  b8 Z2 P' ~
carbon cycle. See page 1314. 5 W, ^: q, F2 x& k: P& t% K
Image: G. Macpherson, T. Gooding, and E. Cottrell
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