Cov pob zeb tsis sib haum yog tsim thaum magma nkag mus rau pob zeb uas twb muaj lawm, crystallizes, thiab solidifies underground tsim intrusions, xws li batholiths, dikes, sills, laccoliths, thiab volcanic caj dab. Kev nkag mus yog ib qho ntawm ob txoj hauv kev igneous pob zeb tuaj yeem tsim. Lwm qhov yog extrusion, xws li volcanic eruption lossis zoo sib xws.
Yuav ua li cas igneous intrusion?
Igneous intrusion form thaum magma txias thiab solidifies ua ntej nws mus txog saum npoo. Peb hom kev nkag mus yog sills, dykes, thiab batholiths (saib duab hauv qab).
Dab tsi ua rau muaj kev cuam tshuam hauv pob zeb?
Ib qho kev nkag mus yog lub cev tsis muaj zog (tsim nyob rau hauv kub kub) pob zeb uas tau crystallized los ntawm molten magma. Ntev Nuj Nplhaib cuam tshuam rau qhov chaw ntawm pob zeb tsis pom kev vim nws ua rau qhov sib txawv ntawm qhov sib txawv ntawm cov magma thiab cov pob zeb nyob ib puag ncig (lub teb chaws lossis cov pob zeb hauv zos).
Laccoliths ua li cas?
Ib lub laccolith yog cov nceb zoo li nkag mus rau hauv qab ntawm ntiaj teb thaum cov kua magma hla nws txoj kev ntawm ob kab kab rov tav ntawm cov pob zeb preexisting ua rau cov ntaub ntawv overlying rau bulge outwards raws li lub feature. hlob.
pom qhov tsis pom kev nkag mus nyob qhov twg?
Kev nkag mus muaj ntau hom ntawv thiab cov ntawv sau, qhia los ntawm cov piv txwv xws li Palisades Sill ntawm New York thiab New Jersey; lub roob Henry ntawm Utah; Bushveld Igneous Complex ntawm South Africa; Shiprock hauv New Mexico; lub Ardnamurchan intrusion nyob rau hauv Scotland; thiab Sierra Nevada Batholith ntawm California.
