Extrusive pob zeb, ib pob zeb uas tau los ntawm magma (molten silicate khoom) uas tau nchuav tawm los yog tawm ntawm lub ntiaj teb saum npoo. Ob lub lava ntws thiab cov khib nyiab pyroclastic (fragmented volcanic khoom) yog extrusive; Lawv feem ntau yog glassy (obsidian)los yog finely crystalline (bas alts thiab felsites). …
4 pob zeb extrusive yog dab tsi?
Extrusive igneous pob zeb tawg rau saum npoo, qhov chaw uas lawv txias sai sai los ua cov pob zeb me me. Qee qhov txias sai sai uas lawv tsim lub iav amorphous. Cov pob zeb no suav nrog: andesite, bas alt, dacite, obsidian, pumice, rhyolite, scoria, thiab tuff.
Dab tsi yog pob zeb extrusive tshaj plaws?
Cov pob zeb uas muaj ntau tshaj plaws yog bas alt, ib pob zeb uas tshwj xeeb tshaj yog nyob hauv qab dej hiav txwv (Daim duab 4.6). Daim duab 4.5: Extrusive lossis volcanic igneous pob zeb tsim tom qab lava txias saum npoo.
pob zeb dab tsi yog extrusive lossis intrusive?
Thaum magma thiab lava txias thiab tawv, lawv tsim igneous pob zeb. Cov pob zeb no tej zaum yuav extrusive los yog intrusive, nyob ntawm seb qhov twg magma los yog lava crystallizes. Bas alt yog pob zeb extrusive ntau tshaj plaws thaum granite yog ib qho kev cuam tshuam ntau heev.
4 extrusive igneous pob zeb yog dab tsi?
Extrusive igneous rock structures: Lava flow, lava toj siab, Volcano. Piav seb cov txheej txheem ntawm compaction thiab cementaction ua sedimentary pob zeb.
