Palaeozoic

I Paleozoic Era yi elide isigaba ngokwaneleyo yophuhliso woMhlaba. Ubukho kangangeminyaka million 370.

Emva ukuyilwa iindawo ezinkulu zomhlaba ekupheleni kwexesha Proterozoic, ixesha Palaeozoic waqalisa omkulu kulwandle olukhulu. Ngokutsho zokuma ezininzi, ngoxa kwakukho amakhulu block umhlaba ekuthiwa Pangea ( "wonke umhlaba," ngolwimi ngesiGrike). Macala konke singqongwe neelwandle. Nale ibloko enkulu wawa ngaphandle ngokuhamba kwexesha. Ngoko ke, ixesha Paleozoic yaba ngexesha lokusekwa iziseko elizayo lelizwekazi. Ngexesha uphuhliso oluqhubekayo lwe zoMhlaba, la malungu kufuneka lenyuke, ukudibanisa (ngeenkqubo orogenic) okanye ukwehla, Iyaqhekeka kwakhona, nto leyo yantlukwano phakathi de kube mzuzu akakafiki ahlala ukuma amazwekazi yangoku.

Hypothesis yokuqala "kokushenxa lizwekazi," wathi Alfred Wenger (komhlaba German). Ngokutsho kwakhe, ekuqaleni, Pangea zahlulwe phakathi ajenos kunye Laurasia.

Amaxesha ngexesha Paleozoic wahlulwe kungena Permian, Carboniferous, Devonian, Silurian, Ordovician kunye Cambrian (omdala).

sigaba Cambrian baqala malunga nezigidi 570. Kwiminyaka eyadlulayo (ngokutsho kweminye imithombo, kancinane ngaphambili). Ixesha eli thuba, 70 yezigidi. Iminyaka. Esi sigaba ekuqaleni edibene dubulo yendaleko ehlabathini, apho kwakukho abameli yokuqala ezininzi iintlobo eziphambili izilwanyana ezaziwa namhlanje.

Umda Precambrian kunye Cambrian waphawula ematyeni, apho ngequbuliso kukho omkhulu iintlobo zezilwanyana amatye kunye amathambo kwizimbiwa. yesiqalo Cambrian kwemvelo yenye eemfihlelo kwimbali planethi. Ukubuyela olula kwizisele eukaryotic (ngakumbi leqela) kwathabatha iminyaka kwezigidi ezibini ezinesiqingatha. Ngokusebenzisa Years million 700. Kwakukho multicellular kuqala. Phezu 100 million. Years of the planet loni iintlobo engakholelekiyo zezilwanyana. Kufuneka kuqatshelwe ukuba ukususela ngelo xesha (iminyaka engaphezu kwama-500 ezigidi) ehlabathini zange abe nasiphi isilwanyana ukuba isakhiwo ngokwesiseko omtsha umzimba.

Ordovician . Malunga 500 yezigidi kwiminyaka eyadlulayo kwaye yaphela -. Bamalunga nama-408 ezigidi kwiminyaka eyadlulayo.

Uninzi ikhweyitha wasezantsi wathabatha ajenos. Ezinye iindawo ezinkulu zomhlaba zaye ucukene kwindawo zemvula. Elingaselwandle ngoxa kuhlala zizilwanyana ezininzi, yahluke gqitha ukusuka abemi kweelwandle le Cambrian. Ilizwe elo angakulungeli ubomi - kwakungekho komhlaba, kungekho zityalo, mercilessly olulophu ilanga, ngokufuthi iinkanyamba kunye mlilo.

Ekupheleni i Ordovician nqanaba laqalisa ukuba ekhethiweyo eludakeni unxweme, zibolele oko, fungi uluntu ulwelwe, iintsholongwane. Ngenxa yoko, umaleko womhlaba kwakhiwa kwakudala.

Ekuqaleni iintlanzi Silurian esezantsi ethathe imilo, kufutshane elinye mihla. Ekupheleni kweqonga ukuqalisa iinkqubo orogenic. Ngenxa yoko, uMenzi Cambrian, iintaba yaseScandinavia kunye massifs kwiMpuma Greenland woMzantsi of Scotland.

Uphuhliso isigaba Devonian le Umhlaba luphawulwa ntlekele kakhulu kwiplanethi yethu. Ngelo xesha, kwakukho wengxabano eGreenland, iYurophu kunye nomNtla Melika. Kuye kwasekwa a zwekazi elikhulu Laurasia.

ixesha Carboniferous (carbon ifayibha) luphawulwa imozulu ezahlukeneyo - kwafika ukutshintsha kwekhulu leminyaka. Noko ke, ngokubanzi, oku (imozulu) hlukile ummandla kufumile ziingcathu, nefumileyo yaye emvula. Oku wadala iimeko ithembisa ukuba ukusasazeka nomgxobhozo kunye izityalo ihlathi kumhlaba.

Ubomi Paleozoic era kwasekwa ayasebenza de ekupheleni kweqonga lokugqibela.

million 299. Kwiminyaka eyadlulayo, waqalisa kwinqanaba lokugqibela Paleozoic. Ngomhla emdeni kwexesha Triassic yeyona kakhulu kwimbali wokutshabalala kweentlobo-langa. Ngelo xesha, ukuba wanyamalala 70 ilizwe% ne-90% ye eziphilayo zaselwandle. Yaphela kanjalo lolawulo Paleozoic.