Juqraafiga. Sidee qaaradda of North America qaraabo kale

Sidee qaaradda of North America eego qaaradaha kale, waxaa go'aan ka ma aha oo kaliya cimilada, laakiin sidoo kale dadweynaha, qaab-dhismeedka dhaqaalaha iyo takhasus qaybinta caalamiga ah ee dhadhaab ay. Dalalka in dhulkeeda, hodan ku ah khayraadka dabiiciga ah ee la xiriira ganacsiga caalamiga ah.

Juqraafiga iyo cimilada

Continent North America maydhay by saddex badaha:, Arctic ee Atlantic iyo Pacific. Mid kasta oo ka mid ah badaha, ay koorsada iyo tacsida hawada loo sameeyay waxa ka weyn, waxa uu leeyahay muhiimad weyn ee cimilada ma aha oo kaliya in dhulka xeebaha, laakiin sidoo kale in arrimaha gudaha ee qaaradda.

On waynaha, waxaa jira saddex dal oo waaweyn - Canada, Maraykanka iyo Mexico. Waxaa sidoo kale jira tiro badan oo ah dalalka jasiiradda iyo dhulal ku tiirsan ee USA. Kanada waa meesha ugu ba'an waqooyi ee ma aha oo kaliya dalka, laakiin qaaradda oo dhan. Waxaan ka hadleynaa Cape "Murchison" ah. Waa on Peninsula Boothia ee Arctic Canadian ah. Magaca cape ee loo magacaabay ka dib markii cilmiga Rene Murchison. Ninkan horeysay sahamiyey Jasiiradda.

Sidee qaaradda of North America qaraabo kale, waxay keentay in taariikhda ay daahfurka, sharaxaad, waxbarasho iyo horumarinta xiga. Maanta, ka mid ah aqoonyahaniinta xayiran opinion in discoverers qaarada ahaayeen wiilashii Viking Group, hijrooday ay dejinta ee Iceland.

Geological Map of North America

Seynisyahanno qaaradda qaybi saddex gobolka waaweyn ee dhulka, xuduudaha taas oo inta badan ku beeganto soohdimaha qaranka ee dalalka ku yaal soohdinta reer waynaha.

gobolkii ugu horreeyey iyo kan ugu qadiimiga geologically waxa uu ku yaalaa ee Kanada. Maxaa loo yaqaanaa? Tani "Shield Canadian", oo ku yaalla waqooyiga xad-dhaaf ah ee qaaradda. Waxa uu la dhisay xilligii qadiimiga Precambrian, taas oo saameyn ku kala duwan dhulka ee dalalka. Sidee qaaradda of qaraabo North America kale, ay sabab u tahay, oo ay ku jiraan, iyo gaar ahaan in laisla wakhtiyadii hore.

Sababo la this feature dhulka, Canada waa mid ka mid ah dalalka ugu kala duwan marka la eego khayraadka macdanta. On dhulka ka mid ah dalalka Arctic waa kayd badan oo nickel, dahab, lead, molybdenum, iyo, ugu muhiimsan, uranium. A dhulal cusub ee laga helay Arctic ah, lacag dhigaal ah diamond ka dhigi dalka mid ka mid ah alaab-qeybiyeyaasha ugu weyn ee alaabta ceeriin ee suuqa caalamiga ah.

Muqaalka muhiimka ah waa joogitaanka cilmi dhul Canadian Sadberiyskogo weysada ore in dhul ka mid ah Gobolka Ontario, sameeyay iyadoo ay sabab u saamayn meteorite on oogada Dhulka a. Gobolka Tani waa mid aad u hodan ku senti bir, taas oo yaab leh ayaa dhacay degaanka ku hareereysan, kaas oo la odhan jiray cillado magnetic Temagami.

Gobolka Geological oo dalka Mareykanka ah oo la mid ah Kanada. The kaliya ee ka reeban yihiin goobaha anomalous, garabaka craters meteorite.

Central America

Sidee qaaradda of North America qaraabo leedahay qayb kale waa ay fududahay in la ogaado by eegaya map-ka. Haddii ay deriskaaga galbeedka - Eurasia - America waa kala qaraabo cidhiidhi ah si ay u Bering Strait, Dariska ee xagga koonfureed, waxa aan loo kala guurin oo dhan, marka laga reebo nin-dhigay Panama Canal.

dalalka Central American aadan haysan heer sare ah horumarinta dhaqaalaha, oo sidaas daraaddeed aad u nugul in ay saamaynta xun ee masiibooyinka dabiiciga ah in inta badan ka dhaca gobolka.

Waxaa ka mid ah masiibooyinka dabiiciga ah ee ugu badan waa in ay tilmaamaan duufaanada la aasaasay in ka badan Atlantic iyo u dhaqaaqo galbeedka iyo koonfurta. Under saameynta ay rogrogo ku dhici doonaan sidii dalalka Mareykanka xeebaha iyo quruumaha jasiiradda of Central America.

hawl seismic

The feature labaad muhiimka ah ee qaab-dhismeedka qaarada waa tiro badan oo ka mid ah goobaha seismically firfircoon, oo sababtay in qaarada dhici dhulgariir ba'an soo gaaray by kun oo qof oo ku nool dalalka soo koraya ka mid ah Caribbean.

The ugu weyn ee dhulgariir oo dhan ka dhacay Maraykanka ah, waxay ahayd Dhulgariirka ee Great Alaska ka dhacay March 1964. Waxay ahayd musiibo cawaaqib ay musiibo dabiici ah, cawaaqibka ka mid ah, kuwaasi oo ay dareemeen in meel ka mid ah konton kun oo kiiloomitir oo laba jibbaaran. Just ka baxsan gariir ayaa la raacay by dhul fara badan, mudflows iyo dhul, isa waddooyinka buurta iyo hor joogsan marinka qalabka badbaadinta in ay meelaha ay ahayd sidaa darteed loo baahan yahay.

Sidoo kale, sida uu yahay qaarada of North America, waxay siinaysaa dalalka qaaradda faa'iido istiraatiiji cad ee xiriirka la deriska dibada.