Ina duwãtsu na Cordillera? Cordillera Mountains: description

Cordillera - duwãtsu, wata babbar tsarin, wanda yake rufe yammacin gefe na nahiyar Amurka ta Arewa. Su mai shimfiɗa for game 7 dubu. Km. Cordillera - duwãtsu, mai girma iri-iri na halitta yanayi. A yawan fasali, su ne halin, kuma shi ya kira su bambantakarsa cikin sauran dutsen tsarin na duniya.

Janar halaye na Cordilleras

Ina duwãtsu na Cordillera? Zai fi dacewa da suka mika a wani shugabanci submeridional. Cikin biyar orotektonicheskih belts shekaru daban-daban kafa wadannan duwatsu. Cordilleras an hada da wani gagarumin rabo daga cikin tsaunuka (2,5-3 dubu. Mita ko fiye bisa teku matakin). Bã su da aiki volcanism kuma high seismicity. Babban tsawon duwatsu daga arewa zuwa kudu ne suka kai ga kasancewar wani jam'i na a jere na altitudinal zones. Cordillera - duwãtsu, kafa a mahaɗar tsakãninsu da lithospheric faranti. A iyaka tsakanin su ne kusan daidai da layin na tudu.

A abun da ke ciki na Cordilleras

Da na uku na yankin na nahiyar baki daya bautar wani dutse Musulunci-block tsarin. Yana yana da nisa daga 800-1600 km. A abun da ke ciki ya hada da dutsen plateaus, intermountain hollows, ridges da volcanic plateaus kuma duwãtsu. Sun nakasawa, volcanic aiki, mun halartar denudation na Cordillera, wanda ƙaddara su ba bayyanar da kuka ɓõye mai yawa ma'aunan kasa Tsarin da ya bayyana a baya. Very iri-irin dutse tsarin a biyu da mai gangara kuma a tsaye shugabanci.

More cikakken bayani game da tsarin da Cordilleras

Asymmetrical surface tsarin da nahiyar, inda duwãtsu na Cordillera. Sun riga sun mamaye yammacin ɓangare, gabashin - da low duwãtsu, kuma sararin filayen. A yammacin ɓangare aka located a tsawon game da 1,700 mita, da kuma gabas - 200-300 mita 720 da mita ne talakawan tsawo na nahiyar ..

Cordillera - duwãtsu, da ciwon a cikin abun da ke ciki a yawan dutsen arcs cewa mika kullum a cikin shugabanci daga arewa maso yammacin zuwa kudu maso gabashin. Daga garin MacKenzie, XP. Brooks, gabas da Rocky Mountains kunshi baka. Intermittent bel kafa daga ciki tudu da tudu located yamma da wadannan jeri. 1-2 dubu. Mita na tsawo. Cordillera - duwãtsu, ciki har da wadannan tudu da tudu: Plateau Yukon, Columbia Plateau da kuma Plateau na British Columbia, Mai girma Basin, Colorado Plateau, da Filato da kuma volcanic Filato na Meseta Tsakiya (ciki na). Mafi yawa suna alternating hollows, ridges da lebur saman canteens.

A mafi dutsen

Cordillera na yammacin ɓangare na tsarin alama mafi girma ridges. Wannan Aleutian Range, Ridge Aleutian Islands, Alaska Range. Karshe ya kai wani tsawo na 6193 mita. Yana Mckinley aka nuna a cikin hoto sama ne mafi girma dutse. Cordillera - tsarin, wanda ya hada da yammacin ɓangare kuma Cascade Mountains, da Coast Mountains na Canada, Sierra Madre Occidental da Sierra Nevada, kazalika da mai gangara Volcanic Sierra daga nan located da aman wuta Orizaba (5,700 mita), da sauransu.

Zuwa yamma, da tsawo ne rage by su. Cordillera - duwãtsu, wanda smoothly cikin kashi mai lebur na nahiyar. Ta dauki a yamma ko bays (California, Puget Sound, Cook) ko da bayyana (Central Valley, kwarin Kogin. Willamette). Wannan rairayin bakin teku nahiyar kafa ridges St. Iliya, Chugachskim, Kenai, Island Ridge Canada, da kuma US Coast Range. Cordillera sarkar kudu na tsaunuka na Mexico bifurcate. Gabas ƙaryata daya daga cikinsu, forming tsibiran West Indies da submarine ridges, sa'an nan ya tafi zuwa ga Venezuelan Andes. Na biyu rabin ne ja ta cikin Panama da kuma Teuantepeksky wuyõyinsu su Colombian Andes.

Tare da abin da da dama daga ƙasa na duwatsu?

An hade da daban-daban shekaru-ƙasar yankunan, kazalika da tarihi na ci gaba. Ba sau daya aka kafa a halin yanzu tsari da babban yankin. Cordillera duwãtsu a halin yanzu form tashi ta cikin daban-daban tafiyar matakai, faruwa a daban-daban sau a nahiyar.

Domin Laurentian Upland, alama mafi tsoho ma'aunan kasa Tsarin, ƙasa leveling surface ne halayyar, da samuwar wanda ya fara a farkon Paleozoic. Undulating surface sa daban-daban na zamani dagagge jure denudation kankara da kuma m tectonic motsi. Ragewan da tsakiyar ɓangare na ƙasa ya jagoranci wani cover na Quaternary glaciation, saboda wanda ya kafa cavities zamani Hudson Bay. Bugu da ƙari kuma, a karkashin tasirin da take da akwai wani jari na ruwa da kuma glacial moraine laka cewa kafa taimako irin (m moraine).

Mai girma da kuma Jamhuriyar Valley ne na tafki irin. Ƙarƙashin rinjayar denudation matakai a wurare daban-daban, dangane da halaye na abin da ya faru na daban-daban kankara, kafa cuesta ridges (da Great Lakes), tako Filato (Mai girma sararan kasa), Midlands da filayen kwarinta yashewa (Ouachita, Ozark).

Very wuya ƙasa da Cordilleras kansu. Band matsawa na ɓawon burodi da aka tsallaka da yawa laifinsu, fara daga teku bene, kuma ƙare a kan ƙasa. An ba tukuna kammala orogenic tafiyar matakai. Wannan ne evidenced da volcanic eruptions (misali, Popocatepetl da Orizaba), kazalika da karfi girgizar asa da cewa faruwa a nan daga lokaci zuwa lokaci.

ma'adanai

Kamar yadda ka sani, da yawa daban-daban ma'adanai za a iya samu a duk inda akwai duwatsu. Cordillera - shi ne ba togiya. Akwai babbar reserves na ba-ferrous da ferrous karafa. Non-ƙarfe man za a iya gano, wanda aka located a cikin intermountain daruna. Reserves na lignite ne a cikin Rocky Mountain yankin (su ciki hollows).

sauyin yanayi

Halayyar da sauyin yanayi zai ci gaba da bayanin irin manyan duwãtsu. Cordillera motsi teku iska talakawa. Saboda wannan, rinjayar da teku ne ƙwarai ya raunana a gabashin shugabanci. Wannan yanayin siffa daga cikin Cordillera aka nuna a cikin ƙasa, kuma ciyayi, da ci gaban zamani glaciation, altitudinal zones. Stretches daga arewa zuwa kudu dutsen jeri kayyade yawan zafin jiki da bambance-bambance a cikin rani da kuma hunturu. A cikin hunturu da shi daga jeri -24 ° C (a Alaska yankin) zuwa +24 ° C (Mexico, kudancin kasar). A lokacin rani da zazzabi kai daga +4 zuwa +20 ° C.

ruwan sama

A arewa maso yammacin dama sosai high ruwan sama. A gaskiya wannan ɓangare na Cordillera aka located a cikin hanyar westerly iskõki hurawa daga tekun Pacific. Ruwan sama a nan - game da 3000 mm. Shin kasa m wurare masu zafi latitudes, a matsayin Oceanic iska talakawa ba su isa su. Low ruwan sama kuma bayyana cikin sanyi halin yanzu gudãna kashe bakin tekun. Ciki Cordillera tsaunuka ma ba yawa moistened. Mountains located a cikin matsakaici subarctic, subtropical da kuma wurare masu zafi sauyin yanayi zones.

Koguna da tabkuna na Cordillera

A gwaji ɓangare na yammacin waɗansu kõguna na nahiyar ta samo asali ne daidai a cikin Cordilleras. Yafi su abinci ne snow da kuma kankara a lokacin rani zo ruwan tufana. Wadannan dutsen koguna, impetuous. The most of su - da Colorado da kuma Columbia. Glacial ko volcanic asalin, ne Cordillera tabkuna. A m Saline plateaus ne m ruwaye. Yana saurã sun dogon wanzu a nan a lokacin da rigar sauyin yanayi, manyan tabkuna.

kayan duniya

Very bambancin Flora na Cordillera. Coniferous dazuzzuka da musamman bayyanar located har zuwa 40 ° C. w. A jinsin abun da ke ciki, su ne arziki sosai. Fir, cypress, fir, thuja (ja itacen al'ul) ne na hali wakilan su. Height conifer ne 80 mita. Tsakanin su ne kusan babu woody undergrowth. Duk da haka, da dama shrubs girma a nan a yalwace. Mutane da yawa a cikin ƙasa murfin na mosses da ferns. A coniferous gandun daji alhãli kuwa motsi zuwa kudu fara fada da sugar Pine, fari fir, yellow Pine. Evergreen sequoia bayyana kara kudu. Kamar yadda rashin ruwa na 42 ° zuwa kudu. w., shrubs maye gurbin gandun daji. Su Juniper, Heather, kuma su tsawo ba kullum wuce mita biyu. Ga ka iya, wani lokacin samun daban-daban na Evergreen itacen oak. Zafi sauyin yanayi a cikin m yankunan da Cordillera rage-rage. Domin su ne halayyar bushe gandun daji, kazalika da yankunan halophytic da sagebrush hamada. Karbar ruwan sama gangaren duwãtsu aka rufe har zuwa wani tsawo na 1200 m Evergreen gandun daji.

Animals cewa rayuwa a cikin duwatsu na Cordillera

Ina da Cordillera duwãtsu aka located, za ka iya samun ruwan kasa grizzly bear - a manyan predator na nahiyar Amurka ta Arewa. Kai American baki bear, da ciwon dogon baki Jawo, yi kawaici a cikin kudu maso yammacin wannan tsarin. Ya halakar da dabbõbin ni'ima da ganimar da amfanin gona. Har ila yau, akwai mutane da yawa lynxes, Foxes da Wolves. A kudancin duwãtsu aka sau da yawa samu arthropod, kadangaru, macizai. Bugu da kari, akwai zaune Gila - kadai venomous lizard legless. Manyan dabbobi a wuraren da mutane rayuwa, ko kashe su, ko su ne musamman rare. Bison da pronghorn (irin gada da wuya faruwa) suna da ceto kawai ta karfi a North American kasa shirye-shirye. Kawai a asusun ajiyar za a iya lura a yau m namun daji.