《科学》[Science]13年6月14日出版pdf全文

nero1981

& m7 }8 j# O; E- ?1 Q- ACOVER Polished thin section (70 micrometers) of volcanic glass, sample , L, D; X( w$ B$ I# G; ?5 a
catalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten # }4 P/ h6 x) Y9 x
lava erupted onto the sea floor freezes to glass and minerals that contain clues 2 ~* N+ G) k% o) F, y
to the lava's ancient past and origin in Earth's deep interior. Volcanic glasses
3 S0 b( A( z9 {+ n. [such as this one may reveal a link between Earth's oxidation state and the deep * p& E  |: j. O; c! |- {
carbon cycle. See page 1314.
4 Q# H; E: s2 i7 o+ v7 rImage: G. Macpherson, T. Gooding, and E. Cottrell
# o) k, s9 `+ h, k+ e( E' {& K

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