Qhov twg yog qhov qub tshaj plaws paub fossils pom?

Video: Qhov twg yog qhov qub tshaj plaws paub fossils pom?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Cov ntaub ntawv pov thawj ntawm biogenic graphite, thiab muaj peev xwm stromatolites, tau pom nyob rau hauv 3.7 billion-xyoo-laus metasedimentary pob zeb nyob rau sab qab teb sab hnub poob Greenland, thiab piav nyob rau hauv 2014 nyob rau hauv Xwm. "Txog ntawm lub neej" tau pom nyob rau hauv 4.1 billion-xyoo-laus pob zeb nyob rau hauv Western Australia, thiab piav nyob rau hauv ib tug 2015 txoj kev tshawb no.

Tib neeg kuj nug tias, lub caij nyoog twg tuaj yeem pom cov pob txha qub?

Cov kws tshawb fawb ntawm UCLA thiab University of Wisconsin-Madison tau lees paub tias qhov microscopic pob txha pom nyob rau hauv ze li ntawm 3.5 billion-xyoo-laus pob zeb nyob rau hauv Western Australia yog cov cov pob txha qub tshaj plaws puas tau pom thiab qhov tseeb ntxov tshaj plaws direct pov thawj ntawm lifeon ntiaj teb.

Ib tug kuj yuav nug, txheej twg yuav muaj cov pob txha qub tshaj plaws? Cov hlob txais pob txha yog cov los ntawm Strelley Pool hauv thaj av Pilbara ntawm sab hnub poob Australia. Lawv yog stromatolites: khaws cia mats ntawm microorganisms sandwiched ntawm txheej ntawm sediment. Cov pob txha yog 3.4 billion xyoo.

Xav txog qhov no, dab tsi yog qhov qub tshaj plaws paub fossil thiab nws muaj pes tsawg xyoo?

Lub Ntiaj Teb Laus Paub Fossils Tau Pom - Thiab Lawv muaj 3.7 billion xyoo Laus . Cov qub pob txha puas tau pom tau pom nyob hauv Greenland, thiab lawv zoo li tau khaws cia ntxov tshaj plaws cov cim ntawm lub neej ntawm Ntiaj Teb.

Dab tsi yog cov hlwb qub tshaj plaws hauv ntiaj teb?

Cov pob txha qub tshaj plaws hauv ntiaj teb tau pom

	Hnub tim: Lub Yim Hli 22, 2011 Source: University of Oxford
Cov ntsiab lus:	Lub ntiaj teb cov pob txha qub tshaj plaws tau pom nyob hauv Australia. Themicroscopic fossils qhia cov pov thawj ntseeg rau cov hlwb thiab cov kab mob nyob hauv lub ntiaj teb tsis muaj oxygen tshaj 3.4 billion xyoo dhau los.
Qhia tawm:

Pom zoo:

Dab tsi yog rau qhov sib txawv loj ntawm lub koom haum los ntawm qhov tsawg tshaj plaws mus rau loj tshaj plaws ecologists?

Lub koom haum loj yog dab tsi, los ntawm qhov tsawg tshaj plaws mus rau qhov loj, uas cov kws tshawb fawb feem ntau kawm? 6 theem sib txawv ntawm lub koom haum uas ecologists nquag kawm yog hom, pejxeem, zej zog, ecosystem, thiab biome

Qhov twg electromagnetic yoj muaj qhov luv tshaj wavelength thiab siab tshaj plaws zaus?

Gamma rays muaj lub zog siab tshaj plaws, qhov luv tshaj wavelengths, thiab cov zaus siab tshaj plaws. Cov xov tooj cua tsis muaj zog, ntawm qhov tod tes, muaj lub zog qis tshaj plaws, qhov ntev tshaj plaws wavelengths, thiab qis tshaj zaus ntawm txhua hom EM hluav taws xob

Koj tuaj yeem qhia tau li cas tias lub pob zeb twg yog qhov qub tshaj plaws?

Lub hauv paus ntsiab lus ntawm superposition hais tias cov pob zeb qub tshaj plaws nyob rau hauv qab, thiab tus yau tshaj yog nyob rau saum. Raws li qhov no, txheej C yog qhov qub tshaj plaws, ua raws li B thiab A. Yog li tag nrho cov txheej xwm raws li hauv qab no: Txheej C tsim

Lub cheeb tsam dej hiav txwv twg muaj biodiversity loj tshaj plaws thiab lub neej dej hiav txwv tshaj plaws?

Epipelagic cheeb tsam nthuav tawm ntawm qhov chaw mus txog 200m nqes. Nws tau txais ntau lub hnub ci thiab yog li muaj cov biodiversity tshaj plaws nyob rau hauv dej hiav txwv. Nws tseem hu ua thaj tsam twilight vim tias lub teeb txwv tsis pub muaj peev xwm lim tau los ntawm cov dej no