The mineral shot changes glass

But want to affirm an astrobleme, need the evidence of macro view, tiny view both side.The evidence on the macro view means whether the geography geography and geology structure that has an astrobleme, like shape whether is wreath form, bowl-like in shape, have inside the pit have no gravel layer.Evidence of tiny view, then need to find out earth is surface rock a layer is pounded at the evidence that the quality changes.The international science field judges to have 3 index signs to the astrobleme:The mineral shot becomes the noodles-like in shape page manage, the mineral shot changes glass, the shot changes the mineral high pressure multiformity change.If can discover one of 3 above-mentioned index signs, can immediately make sure to is an astrobleme.
Process again and again argument after, Chen blares of the research group designed to set out to drill a hole inside the pit at the Xiu rock in the spring of 2009.From is from March, year to August, the drilling kept on for 6 months and acquired a precious underground deep department rock sample, discovered quartz, for bumped shot origins to provide definite evidence.