Video: Coquina pob zeb tsim li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Coquina pob zeb yog ib hom sedimentary pob zeb (tshwj xeeb yog limestone), tsim los ntawm cov deposition thiab tom qab cementation ntawm cov ntxhia los yog cov organic hais nyob rau hauv pem teb ntawm dej hiav txwv los yog lwm yam dej ntawm lub ntiaj teb nto. Hauv lwm lo lus, lub pob zeb yog tsim los ntawm tsub zuj zuj ntawm sediments.
Nyob rau hauv txoj kev no, dab tsi ib puag ncig yog Coquina tsim nyob rau hauv?
A sedimentary pob zeb muaj xws li loosely-consolidated fragments ntawm plhaub thiab/los yog coral. Cov matrix los yog "cement" consolidating cov fragments feem ntau yog calcium carbonate los yog phosphate. Coquina yog pob zeb mos, dawb uas feem ntau siv los ua lub tsev pob zeb. Coquina tsim nyob rau hauv ib puag ncig ze ntawm ntug dej, xws li marine reefs.
Tsis tas li ntawd, Coquina puas yog pob zeb chemical sedimentary? Mineral thiab Tshuaj Kev sib xyaw Coquina thiab hais txog sedimentary pob zeb yog tsim los ntawm calcium carbonate. Thaum cov deposits yog geologically hluas, ntau ntawm calcium carbonate yog nyob rau hauv daim ntawv ntawm aragonite, raws li qhov no yog dab tsi mollusks thiab gastropods siv los tsim lawv lub plhaub.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi pob zeb yog Coquina?
sedimentary pob zeb
Puas yog Coquina txiv neej tsim?
Augustine. Lub tiaj ua si picturesque coquina outcroppings yog qee qhov loj tshaj plaws ntawm ntug dej hiav txwv Atlantic. Cov khoom siv hauv tsev muaj feem xyuam yog tabby, feem ntau hu ua cov pob zeb ntug dej hiav txwv, uas yog qhov pib txiv neej coquina . Tabby yog tsim los ntawm cov txiv qaub los ntawm hlawv oyster shells tov nrog xuab zeb, dej, tshauv, thiab lwm yam plhaub.
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
Lub pob zeb twg loj dua pob zeb?
Sedimentary pob zeb tuaj yeem ua los ntawm cobbles. Cobbles yog pob zeb uas loj dua pebbles tab sis me dua pob zeb. Conglomerate thiab breccia yog
Dab tsi yog pob zeb tsim cov ntxhia pob zeb?
Cov pob zeb tsim cov zaub mov yog: feldspars, quartz, amphiboles, micas, olivine, garnet, calcite, pyroxenes. Minerals tshwm sim nyob rau hauv ib lub pob zeb nyob rau hauv me me yog hu ua "accessory minerals"
Yuav ua li cas lub pob zeb sedimentary ua ib lub pob zeb metamorphic?
Sedimentary pob zeb ua metamorphic nyob rau hauv lub pob zeb voj voog thaum lawv raug tshav kub thiab siab los ntawm faus. Cov kub kub yog tsim thaum lub ntiaj teb daim hlau tectonic txav ib ncig, ua kom sov. Thiab thaum lawv sib tsoo, lawv tsim roob thiab metamorphose
Cov pob zeb hauv av twg tuaj yeem tsim cov pob zeb zoo li lub raum?
Hematite (los yog haematite) Kuj tseem muaj ntau hom hematite, qee yam yog: raum ore, ib qho loj, botryoidal (lumpy) lossis reniform (lub raum zoo li tus) daim ntawv; specularite, micaceous (flaky) daim ntawv; oolitic, ib daim ntawv sedimentary tsim los ntawm cov nplej me me; liab ochre, ib daim ntawv liab earthy