《科学》[Science]13年6月14日出版pdf全文

nero1981

* ?  W7 S1 P, @* A9 _; UCOVER Polished thin section (70 micrometers) of volcanic glass, sample
, P5 m: c! Y1 S, T4 q* O; h0 Kcatalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten - G/ k  X3 h& R& A- E, ?3 P: q9 U
lava erupted onto the sea floor freezes to glass and minerals that contain clues
; E, e- ]( K2 Z8 t* _  fto the lava's ancient past and origin in Earth's deep interior. Volcanic glasses ) s1 e9 B" D/ p+ v1 z9 M3 _6 V
such as this one may reveal a link between Earth's oxidation state and the deep 5 h' w+ {3 P9 [2 w
carbon cycle. See page 1314. / n3 c; V' w/ Y, `
Image: G. Macpherson, T. Gooding, and E. Cottrell
. ~; I3 B% W7 X3 }7 S

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