Lub Tebchaws Liab Liab tau tsim li cas?
Lub Tebchaws Liab Liab tau tsim li cas?

Video: Lub Tebchaws Liab Liab tau tsim li cas?

Video: Lub Tebchaws Liab Liab tau tsim li cas?
Video: khwv nyiaj tsis nce tes yog vim li cas 2024, Kaum ib hlis
Anonim

Euramerica (tseem hu ua Laurussia - tsis txhob totaub nrog Laurasia, - lub Old Red Continent los yog cov Liab Liab Sandstone Teb chaws ) yog ib qho me me supercontinent tsim nyob rau hauv Devonian raws li qhov tshwm sim ntawm kev sib tsoo ntawm Laurentian, Baltica, thiab Avalonia cratons thaum Caledonian orogeny, txog 410 lab xyoo.

Nyob rau hauv no hais txog, thaum twg lub qub teb chaws liab tsim thiab nyob qhov twg?

Liab Liab Sandstone. Liab Liab Sandstone, tuab ntu ntawm Devonian pob zeb (tsim los ntawm 416 lab rau 359.2 lab xyoo dhau los) uas yog teb chaws Europe es tsis yog marine hauv keeb kwm thiab tshwm sim nyob rau sab qaum teb sab hnub poob Europe, Scandinavia, Greenland, thiab qaum teb sab hnub tuaj Canada.

Qhov thib ob, qhov tseem ceeb ntawm Qub Liab Sandstone yog dab tsi? Cov Qub Liab Sandstone yog ib qho kev sib sau ntawm pob zeb hauv North Atlantic cheeb tsam feem ntau ntawm Devonian hnub nyoog. Nyob rau hauv teb chaws Aas Kiv nws yog ib tug lithostratigraphic unit (ib theem ntawm pob zeb strata) uas stratigraphers raws li supergroup raws li txoj cai thiab uas yog ib qho tseem ceeb. qhov tseem ceeb mus rau thaum ntxov paleontology.

Kuj Paub, ua li cas liab sandstone tsim?

Cov tsim ntawm xuab zeb suav nrog ob theem tseem ceeb. Thaum kawg, ib zaug nws tau sau, cov xuab zeb ua xuab zeb Thaum nws yog compacted los ntawm lub siab ntawm overlying deposits thiab cemented los ntawm nag lossis daus ntawm minerals nyob rau hauv lub pore qhov chaw ntawm xuab zeb nplej.

Laurentia euramerica nyob qhov twg thaum lub sij hawm Paleozoic?

paleogeography ntawm lub xeev ncig lub teb chaws ntawm Laurentia . Paleomagnetic pov thawj qhia tias Laurentia tau nyob ntawm paloequator thaum feem ntau los yog tag nrho Cambrian sij hawm.

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