Thaum twg tau pom microfossils?

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Thaum twg tau pom microfossils?
Thaum twg tau pom microfossils?

Video: Thaum twg tau pom microfossils?

Video: Thaum twg tau pom microfossils?
Video: Thaum twg mam tau pom koj (nplooj yaj caiv plawv ) 2024, Hlis ntuj nqeg
Anonim

In 1953, tus lig Stanley Tyler, tus kws tshawb fawb hauv tsev kawm ntawv uas tau tas sim neej xyoo 1963 thaum muaj hnub nyoog 57 xyoo, yog thawj tus neeg nrhiav pom microfossils hauv Precambrian pob zeb. Qhov no thawb lub hauv paus ntawm lub neej rov qab ntau tshaj li ib txhiab xyoo, los ntawm 540 lab mus rau 1.8 billion xyoo dhau los.

Lub sijhawm twg yog microfossils qub tshaj plaws los ntawm?

Cov pov thawj ncaj qha tshaj plaws ntawm lub neej hauv ntiaj teb yog microfossils ntawm cov kab mob permineralized nyob rau hauv 3.465-billion-xyoo-laus Australian Apex chert pob zeb.

microfossils pom nyob qhov twg?

Microfossils muaj nyob hauv pob zeb thiab sedimentsraws li cov microscopic seem ntawm dab tsi ib zaug ua lub neej xws li nroj tsuag, tsiaj txhu, fungus, protists, kab mob thiab archaea. Terrestrial microfossils muaj xws li paj ntoos thiab spores. Marine microfossils pom nyob rau hauv marine sediments yog feem ntau microfossils.

Pom thawj Microfossil nyob qhov twg?

Lawv tau pom nyob rau hauv quartz txheej hauv Nuvvuagittuq Supracrustal Belt hauv Quebec, Canada, uas muaj qee lub ntiaj teb cov pob zeb qub tshaj plaws uas paub txog sedimentary, nws hais.

Thaum twg cov pob txha loj tshaj plaws tau pom?

Cov kws tshawb fawb pom qhov lawv xav tias yog 3.5 billion-xyoo-laus pob txha nyob rau sab hnub poob Australia yuav luag 40 xyoo dhau los. Ib txoj kev tshawb fawb tshiab qhia tau tias cov pob zeb no yeej muaj cov neeg muaj sia nyob - ua rau lawv yog cov pob txha qub tshaj plaws uas tau pom. Qhov kev tshawb pom tau lees tias lub ntiaj teb yog lub tsev rau cov kab mob microbial 3.5 billions xyoo dhau los.

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