Video: Cov plhaub puas tuaj yeem yog pob txha?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog tias plhaub los yog pob txha yog faus nyob rau hauv sediment, nws dissolves qeeb dua. Plhaub yog khaws cia tsis tau yaj tsuas yog thaum lawv faus rau hauv sediments uas muaj calcium carbonate minerals, zoo li limestones. Feem ntau pob txha yog plhaub ntawm marine tsiaj xws li clams, qwj, los yog corals.
Ib yam li ntawd ib tug yuav nug, hom fossil yog lub plhaub?
Ib qho piv txwv feem ntau ntawm cov pob txha muaj xws li ntau hom fossilized plhaub, cov no kuj hu ua ammonites , uas yog fossils ntawm coiled li shells. Cov fossils seashell no yog los ntawm cov tsiaj uas nyob hauv hiav txwv ntawm 240 thiab 65 lab xyoo dhau los.
Kuj Paub, ntau npaum li cas lub plhaub fossils muaj nqis? Seashell pob txha muaj ntau heev, thiab tsis tshua muaj nqi lag luam. Yog li tshwj tsis yog nws txawv txawv, ces cia siab tias yuav tau tsawg dua ib duas rau nws. Cov qauv txawv txawv lossis zoo nkauj tuaj yeem mus qhov twg los ntawm ob peb bucks mus rau. Muaj ntau variables uas yuav txiav txim qhov nqe ntawm a pob txha.
Kuj tseem yuav paub, nws siv sijhawm ntev npaum li cas rau lub plhaub los ua pob txha?
Teb: Fossils txhais tau tias yog cov seem lossis cov kab mob uas tuag ntau dua 10,000 xyoo dhau los, yog li ntawd, los ntawm kev txhais lub sij hawm yam tsawg kawg nkaus nws yuav siv sij hawm los ua ib tug fossil 10,000 xyoo . Tab sis, qhov ntawd tsuas yog ib qho kev txiav txim siab hauv cov xuab zeb - nws txhais tau tias tsawg heev ntawm cov txheej txheem fossilisation.
Yuav ua li cas skeletons ua fossils?
Feem ntau ntawm cov dinosaur cov pob txha koj pom nyob rau hauv tsev cia puav pheej nyob vim muaj pob zeb sedimentary. Tab sis cov pob txha faus tsis zoo ib yam li ib pob txha -- ua ua a pob txha , pob txha yuav tsum ua pob zeb. Cov organic seem ntawm cov pob txha, xws li cov qe ntshav, collagen (ib qho protein), thiab rog, nws thiaj li tawg.
Pom zoo:
Koj puas tuaj yeem muab cov pob zeb tso rau hauv pob zeb tumbler?
Feem ntau hom pob zeb tsis ua haujlwm zoo hauv pob zeb tumbler. Yog tias koj sib tov zoo tumbling ntxhib nrog pob zeb uas qis dua qib qis, cov khoom, cov npoo ntse thiab tawg ntawm cov khoom hauv qab-tumbling-qib tej zaum yuav ua rau cov polish ntawm txhua lub pob zeb hauv lub thoob
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 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
Cov pob txha pob txha qhia peb li cas?
Cov pob txha pob txha muab peb 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, tsis yog qhov seem ntawm lub cev ntawm tus tsiaj tiag tiag
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