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nature : speeding asteroid or comet impact planet's surface, caused shock waves emerging target medium gasification and melting, thermal decomposition, smashing, crushing rocks and minerals and the unique mechanical deformation structure, multi-type and phase change impacts effect. If mineral crystal structural damage, X-ray diffraction spectra widened and Dot 'Stelletta tenui Lindgren,'; There were some mineral-page rationale, the more changes until the body type, and phase change following the shape glass, such as : quartz into coesite, Slovakia quartz, feldspar into Alkali Hollandite structure of the cladding material feldspar and olivine into pyroxene and spinel changes such as garnet. As rock containing the impact pressure wide pieces and melt mixed rock hit, the whole rock melting as jet quenching change blow glass.
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