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Review Exam 1 (09-15-09) - Review for Exam 1 Major and...

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Review for Exam 1 (09-15-09)
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Major and Minor Meteorite Groups Modified Table 1 From Burbine et al. Carbonaceous Chondrites CI phy, mag 0 CM phy, toch, ol, –3 CO ol, px, CAIs, met –4 CR phy, px, ol, met –1.5 CH px, met, ol, –1.5 CV ol, px, CAIs –4 CK ol, CAIs –4 CR ol, px, plag, sul 2.7 Enstatite Chondrites EH enst, met, sul, plag, ±ol 0 EL enst, met, sul, plag 0 Ordinary Chondrites H ol, px, met, plag, sul 0.73 L ol, px, plag, met, sul 1.07 LL ol, px, plag, met, sul 1.26 Achondrites Aubrites (Enstatite Achondrites) enst, sul 0.02 HEDs fromVesta SNC’s from Mars Stony-Irons Mesosiderites basalt-met breccia –0.24 Pallasites ol, met –0.28 Irons 14 minor groups (e.g., IAB,IC, IIAB,IIC….)
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Iron Meteorite
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Stony-Iron
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Stony-Iron
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Carbonaceous Chondrite Meteorite
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Chondrites From undifferentiated asteroids (never melted) Contain chondrules (except CIs), other nebular condensates such as CAIs, and presolar grains Elemental abundances closest to those of the Sun There main subtypes (or minor types): Carbonaceous Ordinary Enstatite
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Achondrites Basically basalts. Includes Lunar, Martian, and
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