《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 . c4 E6 h; R5 t  q6 y$ Z% x; l; X" @
catalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten
1 \* n$ `% V- W* G* [" S/ [2 ulava erupted onto the sea floor freezes to glass and minerals that contain clues
, Y8 Y0 ?: ^  E7 X( Kto the lava's ancient past and origin in Earth's deep interior. Volcanic glasses
" y# [3 c* R8 y1 R& \: H# tsuch as this one may reveal a link between Earth's oxidation state and the deep
! N# o) a$ a1 d* t' xcarbon cycle. See page 1314. 6 m( O4 W' C! k& l  x3 A# }
Image: G. Macpherson, T. Gooding, and E. Cottrell 1 v7 t, J3 X# X" t$ h

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