Video: Cov pob txha pob txha qhia peb li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Taug qab fossils muab peb nrog cov pov thawj tsis ncaj ntawm lub neej yav dhau los, xws li cov hneev taw, lem, burrows, tho txawv, thiab cov quav tso tseg los ntawm cov tsiaj, es tsis yog cov khoom seem ntawm lub cev ntawm tus tsiaj tiag tiag.
Yog li ntawd, dab tsi lub cev fossils qhia peb?
Lub cev fossils yog cov seem ntawm cov lub cev ib feem ntawm cov tsiaj qub, nroj tsuag, thiab lwm yam kev ua neej. Lawv qhia rau peb ib yam dab tsi hais txog qhov tshwm sim ntawm lub neej qub.
Tsis tas li ntawd, cov hniav puas yog pob txha pob txha? Tej yam zoo li cov pob txha, cov hniav , plhaub, thiab nplooj yog suav tias yog lub cev pob txha . Taug qab fossils muab pov thawj ntawm tsiaj txhu los ntawm yav dhau los rau peb. Taug qab fossils suav nrog tej yam xws li ko taw prints, burrows, thiab fossilized qab. Vim li no, taug fossils muaj ntau ntau dua li lub cev pob txha.
Raws li txoj cai, ib daim fossil daim ntawv ua li cas?
Taug qab fossils suav nrog cov hneev taw, txoj kev taug, burrows, noj cov cim, thiab cov cim so. Taug qab fossils muab cov ntaub ntawv hais txog lub cev uas yog tsis qhia los ntawm lub cev pob txha . Cov pob txha pob txha raug tsim thaum lub cev ua ib qho cim hauv av nkos lossis xuab zeb. Cov sediment dries thiab hardens.
Ib qho piv txwv ntawm cov pob txha pob txha yog dab tsi?
Cov kab, burrows, egghells, zes, hniav cim, gastroliths (gizzard pob zeb), thiab coprolites ( pob txha quav) yog piv txwv ntawm taug fossils los yog ichnofossils. Taug qab fossils sawv cev rau cov dej num uas tshwm sim thaum tus tsiaj tseem muaj sia nyob. Yog li, taug fossils tuaj yeem muab cov lus qhia rau kev noj haus thiab kev coj cwj pwm.
Pom zoo:
Dab tsi yog ob yam cuab yeej uas cov kws tshawb fawb siv thaum ntxuav cov pob txha?
Yog li cov kws tshawb fawb siv bulldozers los khawb cov pob zeb thiab av. 2. Cov neeg ua hauj lwm ces siv duav, xyaum, rauj, thiab chisels kom cov pob txha tawm hauv av
Cov pob zeb twg muaj pob txha?
Fossils, cov seem ntawm cov tsiaj thiab cov nroj tsuag lub neej, feem ntau pom nyob rau hauv cov pob zeb sedimentary. Ntawm cov pob zeb sedimentary, feem ntau fossils tshwm sim hauv shale, limestone thiab sandstone. Lub ntiaj teb muaj peb hom pob zeb: metamorphic, igneous thiab sedimentary
Cov kab mob dab tsi los yog cov ntaub so ntswg feem ntau khaws cia ua pob txha?
Lub cev pob txha muaj xws li khaws cia seem ntawm cov kab mob (piv txwv li khov, ziab, petrification, permineralization, kab mob thiab algea). Whereas cov pob txha pob txha yog cov cim qhia tsis ncaj ntawm lub neej uas muab pov thawj ntawm lub cev muaj nyob (piv txwv li hneev taw, burrows, txoj kev thiab lwm yam pov thawj ntawm lub neej txheej txheem)
Puas muaj cov pob txha pom nyob hauv cov pob zeb sedimentary?
Ntawm peb hom pob zeb loj, fossils feem ntau pom muaj nyob hauv pob zeb sedimentary. Tsis zoo li feem ntau cov pob zeb igneous thiab metamorphic, cov pob zeb sedimentary tsim ntawm qhov kub thiab txias uas tsis rhuav tshem cov pob txha
Cov pob txha pob txha tau siv li cas los txhais thiab txheeb xyuas qhov kev faib tawm ntawm lub sijhawm geology?
Index fossils yog siv nyob rau hauv lub formal architecture ntawm geologic lub sij hawm rau txhais lub hnub nyoog, epochs, lub sij hawm, thiab eras ntawm lub sij hawm geological. Cov pov thawj rau cov xwm txheej no tau pom nyob rau hauv cov ntaub ntawv fossil nyob qhov twg muaj qhov ploj ntawm pawg loj ntawm cov tsiaj hauv ib lub sijhawm luv luv ntawm geologically