《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 - l7 w4 N2 r6 w0 g
catalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten ( b) L' j) F9 R9 d/ c1 Y' X, a' {& d$ x
lava erupted onto the sea floor freezes to glass and minerals that contain clues , J3 G- A. M4 {0 N
to the lava's ancient past and origin in Earth's deep interior. Volcanic glasses # O# Y+ O& Z# Y
such as this one may reveal a link between Earth's oxidation state and the deep
0 ?7 m* p/ h+ ^1 Z! Gcarbon cycle. See page 1314. + x" O* v5 }4 C) g6 K
Image: G. Macpherson, T. Gooding, and E. Cottrell
5 {: y) i: I4 L9 p/ o, e) ~

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