《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
& V. v. k* Y" l3 b0 [catalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten # H* J+ P: U- q1 z' ?) e
lava erupted onto the sea floor freezes to glass and minerals that contain clues + x' c# x: H5 {2 v1 Z
to the lava's ancient past and origin in Earth's deep interior. Volcanic glasses ) q2 h! ^* O! c& w9 f0 ^
such as this one may reveal a link between Earth's oxidation state and the deep
( m& B5 \3 P* I5 |5 n, Ncarbon cycle. See page 1314.
" S/ o% L0 U. f( {& a) YImage: G. Macpherson, T. Gooding, and E. Cottrell
( R. }9 ]% J; S% X  S  v$ ^

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