Video: Dab tsi ntawm pob zeb hom columnar jointing tshwm sim nyob rau hauv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
igneous pob zeb
Xav txog qhov no, yuav ua li cas yog columnar basalts tsim?
Cov qauv tawg uas tsim ntawm qhov chaw txias yuav zoo li yuav nthuav tawm hauv lub lava thaum nws txias, tsim ntev, geometric kab. Yog li, raws li lava txias rau daim ntawv basalt , nws yuav tawg nyob rau hauv ib tug hexagonal (los yog lwm yam) zoo thiab daim ntawv kab. Dej tuaj yeem ua lub luag haujlwm hauv lub tsim ntawm columnar sib koom ua ke hauv lava ntws.
Ib sab saum toj no, dab tsi yog pob zeb pob qij txha? Hauv geology, a sib koom yog ib qho tawg tawg pob zeb rau hauv ob seem uas txav deb ntawm ib leeg. A sib koom tsis koom nrog shear txav, thiab cov ntaub ntawv thaum tensile kev nyuaj siab ua txhaum nws qhov pib. Hauv lwm hom fracturing, zoo li hauv kev txhaum, lub pob zeb yog parted los ntawm ib tug pom tawg uas tsim ib tug sib txawv nyob rau hauv lub pob zeb.
Ib yam li ntawd, cov kab basalt nyob qhov twg?
Giant's Causeway nyob rau sab qaum teb sab hnub tuaj ntawm Ireland yog kab tias cov kab nto moo tshaj plaws ntawm cov kab basalt hauv ntiaj teb. Qhov chaw nyob ib ncig ntawm 40, 000 basalt kem tsim cov kauj ruam raws tus dej hiav txwv Atlantic raging zoo li cov staircase uas ua rau cov nthwv dej.
Polygon pob zeb tsim li cas?
Yog hais tias koj xa mus pob zeb zoo li basalt, lub polygons yog tshwm sim los ntawm 2000 degree magma npog qhov chaw thiab tom qab ntawd ntev lub sij hawm lub magma txias. Raws li nws txias nws shrinks thiab qhov shrinking no tshwm sim vertically raws li cov lava qhov nws daim ntawv dab tsi yog hu ua columnar basalt structures.
Pom zoo:
Dab tsi yog qhov txawv ntawm cov pob zeb tsis foliated thiab foliated metamorphic pob zeb?
Foliated metamorphic pob zeb xws li gneiss, phyllite, schist, thiab slate muaj ib txheej txheej los yog banded zoo li uas yog tsim los ntawm raug tshav kub thiab qhia siab. Non-foliated metamorphic pob zeb xws li hornfels, marble, quartzite, thiab novaculite tsis muaj txheej txheej lossis banded zoo li
Dab tsi yog txheej txheem ntuj tsim ua rau ib hom pob zeb hloov mus rau lwm hom?
Peb hom pob zeb tseem ceeb yog igneous, metamorphic thiab sedimentary. Peb txheej txheem uas hloov ib lub pob zeb mus rau lwm qhov yog crystallization, metamorphism, thiab yaig thiab sedimentation. Txhua lub pob zeb tuaj yeem hloov mus rau lwm lub pob zeb los ntawm kev dhau los ntawm ib lossis ntau dua ntawm cov txheej txheem no. Qhov no tsim lub voj voog pob zeb
Lub npe rau lub pob zeb nruab nrab ntawm cov pob zeb uas txias heev yog dab tsi?
Extrusive igneous pob zeb
Dab tsi yog cov pob zeb niam txiv ntawm cov pob zeb metamorphic?
Metamorphic pob zeb Metamorphic pob zeb Texture Niam txiv pob zeb Phyllite Foliated Shale Schist Foliated Shale, granite thiab volcanic pob zeb Gneiss Foliated Shale, granite thiab volcanic pob zeb Marble Nonfoliated Limestone, dolostone
Dab tsi ntawm pob zeb ua rau ib qho chaw pob zeb?
Sedimentary pob zeb