《科学》[Science]13年6月14日出版pdf全文

nero1981

( H1 K, J' ^& Q. J) RCOVER Polished thin section (70 micrometers) of volcanic glass, sample / ~4 o' S# D/ _8 C& C- g
catalog number NMNH115296-3, in transmitted light (14 by 18 millimeters). Molten
7 y2 U/ {# @+ h! V) M5 \( Olava erupted onto the sea floor freezes to glass and minerals that contain clues # |; ~( h# ^; I' Z- s
to the lava's ancient past and origin in Earth's deep interior. Volcanic glasses # P! C' v% ]6 k! M, N
such as this one may reveal a link between Earth's oxidation state and the deep 6 T  K$ ^6 Q; S5 f1 f+ J
carbon cycle. See page 1314. ! G8 s. X) }4 Q4 m+ X# D. G' K
Image: G. Macpherson, T. Gooding, and E. Cottrell
; s0 F' I* u' x2 }8 W% }

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