Qhov kev tsis sib haum xeeb zoo tshaj plaws nyob qhov twg?

Video: Qhov kev tsis sib haum xeeb zoo tshaj plaws nyob qhov twg?

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

Kev tsis sib haum xeeb loj tau pom thiab pom hauv peb Grand Canyon . Nws tuaj yeem pom ntawm lub hauv paus ntawm lub pob tsuas yog qhov chaw uas cov phab ntsa nqes tawm kom tau raws li tus dej Colorado hauv qab no. Lub Great Unconformity yog qhov tseem ceeb thaum nws los txhais cov keeb kwm geological ntawm lub ntiaj teb.

Ib yam li ntawd, nws raug nug, qhov twg yog qhov kev tsis sib haum xeeb loj?

Powell tus Kev tsis sib haum xeeb loj yog ib feem ntawm ib sab av loj kev tsis sib haum xeeb uas nthuav thoob plaws Laurentia, lub hauv paus qub ntawm North America. Nws cim qhov kev loj hlob zuj zus ntawm thaj av no los ntawm lub hiav txwv cratonic ntiav thiab nws faus los ntawm cov dej ntiav ntiav ntawm Cambrian-Early Ordovician Sauk ib ntus.

Kuj Paub, thaum twg yog qhov kev tsis sib haum xeeb loj? Hauv kev tshawb fawb tshiab hauv Kev Ua Haujlwm ntawm National Academy of Sciences ntawm Tebchaws Meskas, cov kws tshawb fawb tau ua rau cov ntaub ntawv hais tias qhov dej khov loj hauv lub sijhawm ntawm Neoproterozoic era, ntawm 720 lab thiab 635 lab xyoo dhau los, ua rau muaj kev puas tsuaj loj ntawm lub ntiaj teb. crust, ua rau Kev tsis sib haum xeeb loj.

Yog li ntawd, qhov twg yog qhov kev tsis sib haum xeeb zoo tshaj plaws tau tshwm sim thiab nyob rau hauv txoj kev twg yog qhov tseem ceeb rau peb kev txhais lub ntiaj teb keeb kwm?

Cov Kev tsis sib haum xeeb loj Nws yog ib qho tseem ceeb rau peb qhov laj thawj: nws sawv cev rau lub sijhawm ntev - 250 txog 1200 lab xyoo hauv Grand Canyon; nws muaj ze li ntawm txhua qhov chaw thoob plaws ntiaj teb; thiab. nws faib cov pob zeb nrog cov pob txha paub los ntawm cov uas tsis muaj pob txha los yog cov kab mob fossil nkaus xwb.

Vim li cas Unconformities tseem ceeb?

Kev tsis sib haum xeeb sawv cev qhov khoob hauv cov ntaub ntawv geological, lub sijhawm ntawm lub sijhawm uas tsis sawv cev los ntawm cov pob zeb. Kev tsis sib haum xeeb tshwm sim rau ob qho laj thawj: sediment deposition nres rau lub sij hawm tseem ceeb thiab / los yog cov pob zeb uas twb muaj lawm tau eroded ua ntej yuav tsum tau npog los ntawm cov me me sediment.

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

Dab tsi yog qhov kev txhais zoo tshaj plaws ntawm kev sib tsoo zoo?

Kev sib tsoo zoo yog txhais tau tias yog ib qho uas cov molecules sib tsoo nrog lub zog txaus thiab kev taw qhia kom raug, kom muaj qhov tshwm sim

Qhov kev tsis sib haum xeeb loj sib cais li cas?

Lub Great Unconformity ntawm Powell nyob rau hauv lub Grand Canyon yog ib cheeb tsam unconformity uas cais lub Tonto Group los ntawm lub hauv paus, faulted thiab tilted sedimentary pob zeb ntawm lub Grand Canyon Supergroup thiab vertically foliated metamorphic thiab igneous pob zeb ntawm lub Vishnu Basement pob zeb

Dab tsi yog qhov teeb meem loj tshaj plaws ntawm kev siv cov kev tshawb fawb txog kev sib raug zoo?

Tej yam tsis zoo los yog kev tshawb fawb txog kev sib raug zoo muaj xws li: a. Lawv tsis tuaj yeem siv los tsim kom muaj kev sib raug zoo-thiab-tshuaj los yog kev coj ntawm kev cuam tshuam