Gneiss yog ntxhib mus rau nruab nrab grained banded metamorphic pob zeb tsim los ntawm igneous los yog sedimentary pob zeb thaum lub sij hawm lub regional metamorphism. nplua nuj nyob rau hauv feldspars thiab quartz, gneisses kuj muaj mica minerals thiab aluminous los yog ferromagnesian silicates.
Niam txiv pob zeb ntawm gneiss yog dab tsi?
Gneiss yog lub pob zeb nruab nrab-rau-ntxhiab-grained tsim nyob rau hauv qib siab-metamorphic mob. Gneiss feem ntau yog tsim los ntawm quartz, potassium feldspar, thiab plagioclase feldspar nrog tsawg dua ntawm biotite, muscovite, thiab amphibole. Granites thiab qee zaum rhyolite muab lub pob zeb niam txiv rau gneiss.
Gneiss pob zeb tsim nyob qhov twg?
Gneiss feem ntau tsim los ntawm cheeb tsam metamorphism ntawm convergent phaj ciam teb. Nws yog cov pob zeb metamorphic qib siab uas cov pob zeb hauv av recrystallized nyob rau hauv qhov kub thiab txias.
Puas yog gneiss tsim los ntawm schist?
Gneiss yog metamorphic pob zeb tsim los ntawm kev hloov schist, granite, lossis pob zeb volcanic los ntawm kev kub ntxhov thiab siab. Gneiss yog foliated, uas txhais tau hais tias nws muaj cov txheej txheem sib dua thiab tsaus dua. … Gneiss yog tsim los ntawm coarse-grained minerals xws li quartz thiab feldspar.
pob zeb ua gneiss?
Granite yog lub pob zeb tsis pom kev uas tsim thaum magma txias kuj qeeb hauv av. Nws feem ntau yog tsim los ntawm cov zaub mov quartz, feldspar, thiab mica. Thaum granite raug kub hnyiab thiab siab,nws hloov mus ua ib lub pob zeb metamorphic pobhu ua gneiss.
