Qhov sib txawv tseem ceeb ntawm stromatolites thiab thrombolites yog tias stromatolites yog txheej txheej sedimentary tsim los ntawm cyanobacteria, thaum thrombolite tsis yog txheej txheej sedimentary tsim los ntawm cyanobacteria.
Stromatolites thiab thrombolite yog ob qho tib si organosedimetary tsim uas tau nyiam cov kws tshawb fawb xyoo dhau los. Stromatolites muaj cov txheej txheem txheej, thaum thrombolites muaj cov kab mob los yog cov kab ke. Niaj hnub no stromatolites feem ntau pom nyob rau hauv cov pas dej hypersaline thiab cov pas dej. Thrombolites feem ntau pom muaj nyob rau hauv cov cheeb tsam ntawm cov dej hauv av uas muaj cov ntsiab lus siab ntawm cov as-ham thiab cov organic acids. Stromatolites thiab thrombolite ob leeg muaj qhov tseem ceeb vim tias lawv muaj cov pov thawj qub tshaj plaws ntawm lub neej hauv ntiaj teb.
Stromatolites yog dab tsi?
Stromatolites yog txheej txheej sedimentary tsim los ntawm cyanobacteria. Lawv yog cov pob zeb txheej los yog cov kab mob microbial reefs uas yog tsim los ntawm photosynthetic cyanobacteria. Kev tsim ntawm stromatolites yog vim muaj cov av khib nyiab, khi, thiab nag lossis daus ntawm cov zej zog microbial. Cov qauv no feem ntau tsim tau qeeb heev. Ib qho 1 m qauv tuaj yeem muaj hnub nyoog 2000 txog 3000 xyoo. nthuav heev, me me microbes uas tsim cov stromatolites niaj hnub no zoo ib yam li cov uas muaj 3.5 billion xyoo dhau los.
Daim duab 01: Stromatolites
Stromatolites muaj cov kab mob nquag ntawm cov txheej txheem saum npoo. Lub hauv paus yog ib tug lithified seem ntawm yav tas los microbial nto cov zej zog. Yog li ntawd, stromatolites tuaj yeem siv los ua cov pob txha pob txha. Stromatolites yog ib qho laj thawj vim li cas tib neeg muaj sia nyob niaj hnub no. Ua ntej muaj cov kab mob cyanobacteria hauv stromatolites, cov huab cua tsuas muaj 1% oxygen xwb. Tom qab ntawd cov photosynthetic cyanobacteria nyob rau hauv stromatolites pumped oxygen rau hauv dej hiav txwv. Thaum cov dej hiav txwv tau saturated nrog oxygen, cov pa oxygen tau tso rau hauv qhov chaw. Niaj hnub no, muaj nyob ib ncig ntawm 20% oxygen nyob rau hauv cov huab cua, yog li cov kab mob nyob muaj peev xwm vam meej thiab evolve. Txawm niaj hnub no, stromatolites uas nyob hauv qab dej tso pa oxygen mus rau qhov chaw.
Dab tsi yog Thrombolites?
Thrombolites yog cov tsis-txheej txheej sedimentary tsim los ntawm cyanobacteria. Lawv yog cov khoom tsim tawm los yog cov txheej txheem uas tsim los ntawm kev ntxiab, khi, thiab cementation txheej txheem ntawm biofilms ntawm cov kab mob, tshwj xeeb tshaj yog cyanobacteria. Thrombolites muaj cov qauv tsim. Txhua lub pob zeb hauv thrombolite muaj cais cyanobacterial colony. Lub clots yog millimeter mus rau centimeters. Cov clots kuj cuam tshuam nrog xuab zeb, av nkos, lossis sparry carbonate. Cov clots uas ua thrombolite yog hu ua thromboids. Tsis tas li ntawd, txhua lub pob zeb muaj cov qauv sab hauv ntawm cov hlwb thiab cov rimmed lobes uas feem ntau yog vim qhov calcification ntawm cyanobacterial colony.
Daim duab 02: Thrombolites
Muaj ob hom thrombolites: calcified microbe thrombolites thiab coarse agglutinated thrombolites. Thrombolites tuaj yeem paub qhov txawv ntawm microbialites lossis stromatolites vim lawv qhov loj me. Calcified microbe thrombolite tshwm sim nyob rau hauv cov pob zeb sedimentary thaum lub sij hawm Neoproterozoic thiab Palaeozoic eras. Yog li ntawd, lawv tuaj yeem siv los ua cov ntaub ntawv fossil qub.
Dab tsi yog qhov zoo sib xws ntawm Stromatolites thiab Thrombolites?
- Stromatolites thiab thrombolite yog ob qho tib si organosedimetary formations.
- Lawv yog ob qho tib si qub heev.
- Cyanobacteria yog cov zej zog microbial pom nyob rau hauv ob lub qauv.
- Stromatolites thiab thrombolite ob leeg muaj qhov tseem ceeb vim tias lawv muaj cov pov thawj qub tshaj plaws ntawm lub neej hauv ntiaj teb.
- Lawv tuaj yeem siv ua cov ntaub ntawv pob txha qub.
- Ob leeg tseem ceeb heev rau lub ntiaj teb thaum lawv tso pa oxygen mus rau qhov chaw.
Qhov txawv ntawm Stromatolites thiab Thrombolites yog dab tsi?
Stromatolites yog txheej txheej sedimentary uas tsim los ntawm cyanobacteria, thaum thrombolites tsis yog txheej txheej sedimentary uas yog tsim los ntawm cyanobacteria. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm stromatolites thiab thrombolites. Tsis tas li ntawd, stromatolites tsis loj loj, thaum thrombolite loj loj.
Cov hauv qab no infographic teev qhov sib txawv ntawm stromatolites thiab thrombolite hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Stromatolites vs Thrombolites
Stromatolites thiab thrombolites yog cov qauv organosedimetary uas qhia qhov tseem ceeb zoo li cov ntaub ntawv keeb kwm qub. Stromatolites yog txheej txheej sedimentary tsim los ntawm cyanobacteria. Thrombolites yog non-layered sedimentary formations generated los ntawm cyanobacteria. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm stromatolites thiab thrombolites.
