n ib qho dej hiav txwv dav dav uas tau tawm los ntawm qhov tawg, feem ntau pom tau tias yog ib feem ntawm cov dej ntws saum toj ntawm lwm tus, ua rau toj siab.
bas alt siv rau dab tsi?
Bas alt siv rau dab tsi? Bas alt feem ntau yog siv rau cov khoom siv hauv tsev xws li cib, vuas, cov hauv paus thiab cov duab puab, nrog rau hauv cov pob zeb rau cov laj thawj thermal thiab kev tsheb ciav hlau. Nws tseem tuaj yeem pom thaum saib lub hli raws li qhov tsaus ntuj uas tau tsim los ntawm cov lava thaum ub.
bas alt siv rau dab tsi thiab vim li cas?
Siv. Bas alt yog used hauv kev tsim kho (xws li ua tsev thaiv lossis hauv av), ua pob zeb (los ntawm columnar bas alt) thiab ua cov mlom. Cua sov thiab extruding bas alt yields pob zeb ntaub plaub, uas muaj peev xwm ua tau zoo heev thermal insulator.
Koj tuaj yeem qhia tau li cas yog pob zeb yog bas alt?
Bas alt tshwm dub lossis greyish-dub, qee zaum nrog ntsuab lossis xim liab. Xav tias nws qhov kev ntxhib los mos. Bas alt muaj ib tug nplua thiab txawm-grain. Lub pob zeb ntom ntom tsis muaj cov muaju lossis cov ntxhia hauv qhov muag pom.
bas alt metamorphose yog dab tsi?
Ntau ntawm cov bas alt raug rau hom metamorphism hloov mus ua ib hom pob zeb metamorphic hu ua greenschist. Greenschist muaj ib pawg ntawm cov zaub mov, qee qhov ntawm lawv ntsuab, uas yuav suav nrog chlorite, epidote, talc, Na-plagioclase, lossis actinolite.
