Koom Haum Niam thiab minerals nyob rau hauv North America

Av North America npog ib tug loj cheeb tsam. Nyob rau hauv loj nws yog tus thib peb nyob rau hauv lub ntiaj teb no. Vim lub topography thiab natural resources ntawm North America yog yus muaj los ntawm yawm muaj ntau haiv neeg. Qhov no yuav tsum tau tham ntau yam ntxiv ...

thaj txoj hauj lwm

Lub teb chaws yog nyob rau hauv sab qaum teb thiab Western hemispheres ntawm lub ntiaj teb. Nws yog ntxuav los ntawm lub Pacific thiab cov Atlantic thiab Arctic Oceans, hais ib tug ntau yam ntawm bays thiab seas. Los ntawm South America, ib sab av loj separates lub Isthmus ntawm Panama, nyob rau hauv lub sab hnub poob ntawm Eurasia, nws yog muab faib los ntawm lub Bering Strait.

Lub continental ib feem ntawm North America yog ib thaj chaw ntawm 20,36 lab square meters. km. Cov Islands tuaj rau ntawm lub mainland ib feem ntawm Greenland, Caribbean, lub Canadian Arctic Archipelago, thiab lwm tus neeg. Los ntawm sab qaum teb-sab qab teb ntev ntawm lub teb chaws ntawm 7326 kilometers, los ntawm sab hnub poob mus rau sab hnub tuaj - 4700 kilometers.

mainland chaw uas zoo heev yog yuav luag nyob rau hauv tag nrho cov cheeb aav. Lub teb chaws As Mes Lis Kas thiab Canada, nrog rau cov Bahamas, Bermuda thiab Greenland tshwm sim tawm lub North American cheeb tsam. Cov yav qab teb ib feem, uas yog nyob rau hauv lub tropics, yog ib feem ntawm lub Central American cheeb tsam.

nyem

Koom Haum Niam thiab minerals nyob rau hauv North America yog ciav muaj ntau haiv neeg. Lub nto ntawm lub teb chaws no uas muaj nyob rau hauv kev sib piv - muaj roob thiab canyons, nras thiab toj. Feem ntau ntawm cov chaw uas zoo heev nyob los ntawm cov nras rau ob tog ntawm lawv ciam teb ntawm lub roob. Lub qhov siab ntawm lub nras yuav txawv ntawm ib tug ob peb puas meters, uas ua rau nws heev laim ntoom struts.

Nyob rau hauv sab qaum teb yog ib feem ntawm lub Laurentian upland yog bordered rau sab qab teb saw ntawm loj pas dej. Nyhuv glacier muab smoothed zoo li tus pob zeb thiab toj, tus tsim ntawm hollows. Mus rau sab qab teb yog cuam kawb Central Valley, thiab txoj cai tom qab lawv - lub Mississippi hav.

Nyob rau hauv lub sab hnub poob ib feem ntawm lub Great Plains yog - lub foothills ntawm tus Cordillera. Lawv mus txog txog li 1,500 meters nyob rau hauv qhov siab. Cordillera yog cov feem ntau quav tsam, lub siab tshaj plaws qhov siab - yog sab saum toj ntawm Mount McKinley nyob rau hauv lub 6193 meters. Lawv ua li rau sab hnub tuaj ib feem ntawm lub Rocky Toj siab (4,200 m) thiab cov Cascade roob.

Nyob rau hauv lub sab hnub tuaj txheej txheem Appalachian sawv cev los ntawm nruab nrab siab toj nrog cov cais arrays txog li 2000 meters. Nyob rau hauv sab qab teb ntawm lub teb chaws yog Mexican thiab cov Atlantic nqaum tiaj, tsis tau siab tshaj ob puas meters. Tawm ntug dej hiav txwv, lawv hais tuav, terraces, lagoons, nqaub.

geotectonic qauv

Lub North American sab av loj yog lub hauv paus platform, feem ntau ntawm uas yuav siv sij hawm lub Canadian ntaub thaiv npog, tsim nyob rau hauv thaum ntxov Precambrian. Nws npoo yog rho, muaj tso ntawm hmoov txhuas, npib tsib xee, kub, cobalt ores thiab lwm yam minerals nyob rau hauv North America.

Los ntawm sab hnub tuaj mus rau lub Canadian ntaub thaiv npog Appalachian sib tshooj. Nyob rau hauv cov tais-thaiv roob xeeb cov txheej txheem ntawm kev puas tsuaj. Qhov muag plooj chaw muab mus rau hauv lub hav, thiab qhov ntau resistant pob zeb nyob rau hauv daim ntawv ntawm elevations.

Nyob rau hauv lub sab hnub poob ib feem ntawm lub teb chaws yog Cordilleran cheeb tsam nruab nrab ntawm folding, tsim los ntawm cov kev sib tsoo ntawm tectonic daim hlau. Qhov no txoj kev tseem niaj hnub no. Cov tsim Cordilleras kuj pawg glacier. Yog li ntawd, nyob rau hauv cov cheeb tsam no yog nyob rau hauv ob qho tib si sedimentary thiab igneous minerals nyob rau hauv North America.

Great Plains yog nyob rau ntawm tus ciam teb ntawm lub platform thiab cov Cordillera. Lawv tsim los ntawm marine thiab continental sediments. Muaj zoo xws li cov hauv paus pib thiab lub Central Valley. Nyob rau hauv lawv sab qab teb-sab hnub tuaj lub ntsej muag Karst pob zeb, tsim ib tug tshawb ntawm sib sib zog nqus - Mammoth qhov tsua. Sedimentary pob zeb tsim thiab Mexican lowland.

North America: Minerals (luv luv)

Lub geological qauv yog cov thawj tseem ceeb rau cov tsim ntawm tej mineral kev pab. Tsaug rau nws cov tshwj xeeb tsa, cov zaub mov nyob rau hauv North America yog yuav luag thoob plaws lub teb chaws.

Nyob rau hauv Canadian ntaub thaiv npog cheeb tsam tseem ceeb tso ntawm uranium ores thiab hlau, molybdenum, npib tsib xee, tooj liab. Nyob rau hauv lub chaw ntug hiav lowlands, raws li zoo raws li nyob rau hauv lub Cordilleras thiab Alaska yog reserves ntawm cov pob txha fuels. Ntawm no mined minerals xws li cov North American roj thiab cov nkev.

Nyob rau hauv lub central regions thiab depressions yog Appalachian thee deposits. Nyob rau hauv Cordilleras ntau ntau yam sedimentary thiab magmatic minerals, xws li kub, ores uas tsis yog-ferrous co, mercury. Loj deposits ntawm phosphate muaj nyob rau ntawm ib tug ceg av qab teb hu ua Florida.

Minerals North America: cov lus

Rau ib tug zoo xaav peb txiav txim siab los muab tso ua ke tag nrho cov ntaub ntawv thiab nthuav tawm nyob rau hauv ib lub rooj, uas yog hais hauv qab no.

xaus

Lub teb chaws ntawm North America yog nyob rau hauv sab qaum teb thiab Western hemispheres ntawm cov ntiaj chaw. Nws thaj chaw, tej yam ntuj tso tej yam kev mob thiab geological qauv pab cov tsim ntawm mineral kev pab.

Qhov loj minerals nyob rau hauv North America - nws yog uas tsis yog-ferrous hlau ores, nematallicheskie ore thiab pob txha fuels. Ntawm lawv, nkev, roj, thee, phosphates, uranium, hmoov txhuas, zinc, npib tsib xee, nyiaj ore, kub, platinum thiab lwm tus neeg.

Vim coob tus thiab muaj ntau haiv neeg ntawm cov kev pab, ob tug loj lub xeev nyob rau hauv thooj av loj muaj peev xwm muab rau lawv tus kheej thiab tsis tau nyob rau lwm lub teb chaws.