Relief da kuma ma'adanai a Arewacin Amirka

Nahiyar Amirka ta Arewa ta rufe wani babban yanki. A size shi ne na uku a duniya. Saboda da topography da kuma albarkatun kasa na North America ne halin da] imbin bambancin. Wannan za a tattauna more ...

Gwargwadon matsayi

A nahiyar dake arewacin da kuma yammacin hemispheres na duniya. An wanke ta da Pacific da kuma Atlantic, kuma Arctic tekuna, gabatar da wani iri-iri na bays da tekuna. Daga Kudancin Amirka, a nahiyar rarrabe Isthmus of Panama, a yamma na Eurasia, shi ne raba da Bering mashigar.

A nahiyar bangare na North America ne wani yanki na 20,36 miliyan murabba'in mita. km. Daga cikin tsibiran na babban yankin na Greenland, Caribbean, da Kanad Arctic tarin tsiburai, da sauransu. Daga arewa-kudu tsawon na nahiyar 7326 kilomita, daga yamma zuwa gabas - 4700 kilomita.

babban yankin ƙasa ne kusan a duk yanayin zones. The United States, kuma Canada, tare da Bahamas, Bermuda da Grecia dokoki da North American yankin. A kudancin, wanda aka located a cikin tropics, wani bangare ne na Tsakiyar Amirka yankin.

taimako

Relief da kuma ma'adanai a Arewacin Amirka suna dukar bambancin. A surface na nahiyar da aka wakilta, a saba - akwai duwatsu da tsaunuka, da kuma filayen tuddai. Mafi yawa daga cikin ƙasa shagaltar da filayen a garesu na kan iyaka da duwãtsu. A tsawo daga cikin filayen iya bambanta tsakanin 'yan ɗari mita, wanda ya sa ya quite wavy ƙasa.

A arewacin Laurentian Upland aka kẽwayesu a kan kudu sarkar na manyan tabkuna. Effect gleiser auren smoothed dimbin yawa kankara da tuddai, da samuwar hollows. Don kudu ne m Tsakiya Valley, da kuma yancin bãyansu - Mississippi kwarin.

A yammacin ɓangare na Great sararan kasa ne - na Shefela na Cordillera. Suna isa har zuwa 1,500 mita tsawo. Cordillera ne mafi Musulunci zone, matsakaicin tsawo - shi ne saman Mount McKinley a 6193 mita. Sun yi har da gabashin ɓangare na Rocky Mountains (4,200 m) da kuma Cascade Mountains.

A gabas shirya Appalachian wakilta matsakaici high tuddai da raba iri-iri na har zuwa 2000 mita. A kudancin nahiyar ne Mexican da Atlantic bakin teku a fili, ba wucewa biyu da ɗari mita. Kashe bakin tekun, suka gabatar da sanduna, baranda, lagoons, spits.

geotectonic tsarin

A Arewacin Nahiyar Amirka ne kafuwar dandali, mafi yawan abin da daukan Kanad Shield, kafa a farkon Precambrian. Its gefuna an tsallake, akwai adibas na darma, nickel, da zinariya, cobalt ores da sauran ma'adanai a Arewacin Amirka.

Daga gabas zuwa Kanad Garkuwa Appalachian zoba. A cikin wadannan folded-block duwãtsu fãra tafiyar matakai na halaka su. Heart yankunan juya a cikin kwarin, da kuma more resistant dutse bar a cikin nau'i na mukamai.

A yammacin ɓangare na nahiyar ne Cordilleran yankin talakawan na nadawa, kafa ta karo na tectonic faranti. Wannan tsari ya ci gaba a yau. Da samuwar Cordilleras kuma ya rinjayi gleiser. Saboda haka, a cikin wannan yankin da ake located in duka biyu sedimentary da igneous ma'adanai a Arewacin Amirka.

Great sararan kasa da aka located a kan iyakar da dandamali da kuma Cordillera. Suna kafa ta marine da kuma nahiyar sediments. Da irin wannan asalin da kuma Jamhuriyar Valley. A da kudu-maso-gabashin fuska karst kankara, da samar da wani Maze of zurfin - Santa kõgon. Sedimentary kankara kafa da Mexican filayen kwari.

North America: ma'adanai (takaice)

A ma'aunan kasa tsari ne na farko da muhimmancin da samuwar wasu albarkatun ma'adinai. Godiya ta zuwa ga na musamman tsarin, da ma'adanai a Arewacin Amirka ne kusan a ko'ina cikin nahiyar.

A Kanada garkuwa yanki ne muhimmi adibas na uranium ores da baƙin ƙarfe, molybdenum, nickel, jan. A jihar bakin teku filayen kwarinta, kazalika a Cordilleras da kuma Alaska ne reserves na burbushin habaka. Ga mined ma'adanai irin matsayin North American man fetur da kuma iskar gas.

A cikin tsakiyar yankunan da depressions ne Appalachian kwal. A Cordilleras ne daban-daban sedimentary da magmatic ma'adanai, kamar zinariya, ores na ba-ferrous karafa, Mercury. Manyan adibas na phosphate suna located a kan wani sashin ya kira Florida.

Ma'adanai North America: tebur

Domin mafi ji mun yanke shawarar saka tare da dukan bayanai, kuma gabatar a cikin tebur, wanda aka gabatar a kasa.

ƙarshe

A nahiyar Amurka ta Arewa da aka dake arewacin da kuma yammacin hemispheres na duniya. Its Gwargwadon wuri, yanayi da kuma yanki tsarin rinjayi samuwar albarkatun ma'adinai.

Manyan ma'adanai a Arewacin Amirka - yana da ba ferrous karfe ores, nematallicheskie tama da burbushin habaka. Daga gare su, iskar gas, da man fetur, da kwal, phosphates, uranium, gubar, tutiya, nickel, da azurfa tama, da zinariya, platinum da sauransu.

Saboda da manyan yawan da kuma bambancin da albarkatun, biyu manyan kasashe a babban yankin zai iya samar da wa kansu da kuma ba za a dogara a kan wasu ƙasashe.