Palaeozoic

Paleozoic Era The dheer waa heerka ku filan horumarka dhulka. Waxay qaadatay 370 milyan oo sano.

Ka dib markii formation of qaybo badan oo dalka dhamaadka xilligii Proterozoic, marxalad Palaeozoic bilaabay badaha ku daateen ballaaran. Sida laga soo xigtay Haseyeeshee badan, halka waxaa uu ahaa mid ka mid ah block dalkii weyn oo la yidhaahdo Pangea ( "dunida oo dhan" ee luqada Giriigga). On dhinacyada oo dhan, waxaa ku hareereysan badaha. Iyada oo ay taasi block weyn ku dhacay marka laga reebo muddo. Sayidka, xilligii Paleozoic ahayd markii ugu of formation of aasaaska mustaqbalka ee qaarada. Inta lagu guda jiro horumarinta dheeraad ah oo Dhulka, qaybo ka mid ah kuwan la kordhin ayaa laga yaabaa, in lagu xiro (iyada oo loo marayo geedi socodka orogenic) ama hoos u dhac, jebinta burburin mar kale, taas oo inaga fakadaan laga yaabaa marka laga reebo ilaa iyo haatan aan weli booskaasi oo ka mid ah qaaradaha hadda.

xiqiijiyay hore ee "miyigii qaaradda," ayuu yiri Alfred Wenger (geologist Jarmal). Sida laga soo xigtay isaga si, markii hore, Pangea kala Gondwana iyo Laurasia.

The muddo ah xilligii Paleozoic loo kala qaybiyaa Permian, Carboniferous, Devonian, Silurian, Ordovician iyo Cambrian (ugu qadiimisan).

stage Cambrian bilaabay oo ku saabsan 570 million. Years ka hor (sida ay ogaatay qaar ka mid ah, wax yar ka hor). Muddada muddada this, 70 million. Years. Marxaladda bilaabo xiran yahay qaraxa evolutionary ee adduunka, taas oo ay jirto ahaayeen wakiillo koowaad ee inta badan oo ka mid ah kooxaha ugu waaweyn ee xoolaha waxaa loo yaqaan maanta.

oo soohdintu waxay ka mid ah Precambrian iyo Cambrian arkay dhagaxyada, halkaas oo si lama filaan ah waxaa jira weyn kala duwan ee xoolaha fossils la Qalfoofkii macdanta. Qarax evolutionary Cambrian waa mid ka mid ah waxyaalaha qarsoon ee taariikhda adduunka. Si ay u tagaan ugu fudud ee unugyada eukaryotic (more adag) waxay soo qaadatay laba milyan iyo badh sannadood. Iyada oo 700 million. Years waxaa jiray multicellular ugu horeysay. Iyo in ka badan 100 million. Years of meeraha qabsado kala duwan cajiib ah oo xoolaha. Waa in la ogaadaa in tan iyo wakhtigaas (in ka badan 500 oo milyan oo sano) ee dunida ma lahayn wixii xayawaan ah isagoo qaab aasaas cusub ee jirka.

Ordovician . About 500 milyan oo sano ka hor bilowday oo waxaa dhammaadkeedu -. Ku dhowaad 408 milyan oo sano ka hor.

Inta badan Hemisphere ka Koonfureed qaaday Gondwana. Meelaha kale ee waaweyn ee dalka ayaa ku urursan aagga Equatorial. Badda halka by xayawaanka badan deggan yahay, waa mid aad u kala duwan oo ka degganaa badaha ee Cambrian ah. Dhulku wuxuu ahaa ficil ahaan ku haboonayn in nolosha - waxaa jiray ciidda ma, dhirta ma, naxariis darro ah hanfi qorraxda, inta badan duufaanada iyo buureedyada.

By dhamaadka marxaladda Ordovician waxay bilaabeen inay la soo xulay in dhoobo xeebta, waxaa wadnay, bulshada fangaska ee algae, bakteeriyada. Sidaas darteed, lakabka carrada sameeyay heer hoose ah.

Bilowga kalluunka Silurian qaaday qaabka, meel u dhow mid ka mid ah casriga ah. By dhamaadka marxaladda bilowdo geeddi orogenic. Sidaas darteed, waxay la aasaasay ka Cambrian, buuraha Scandinavian iyo massifs Bariga Greenland iyo xagga koonfureed oo reer Scotland.

horumarinta stage Devonian dhulka waxa lagu gartaa masiibooyinka ugu weyn caalamka. Oo wakhtigaas, waxaa jiray kulanka ka mid ah Greenland, Yurub iyo Waqooyiga America. Waxaa la aasaasay qaaradda weyn Laurasia.

muddo Carboniferous (fiber carbon) lagu gartaa cimilada kala duwan - isbedelka yimid qarnigii qarnigii. Si kastaba ha ahaatee, guud ahaan, waxaa (cimilada) khilaafeen zone qoraxda, dadka fareen iyo kulaylaha qoyan. Tani abuuray xaalad faa'ideynaayo for faafinta dhiiqo iyo daaqsinka kaynta on dalka.

Nolosha Zaman Paleozoic la sameeyay arrin firfircoon ilaa iyo dhamaadka marxaladda la soo dhaafay.

299 million. Years ka hor, waxay bilaabeen heerka ugu dambeeya ee Paleozoic ah. On soohdinta reer muddo Triassic ahaa ugu ballaaran ee taariikhda eynu noocyada meeraha ee. Wakhtigan, waa la waayay oo ku saabsan 70% dhulka iyo 90% ka mid ah noolaha badda. Sayidka dhamaaday xilligii Paleozoic.