uttar America ka bhoogol

uttar America, afreeka aur Asia ke baad vishv ka teesara sabse bada mahaadveep hai. yeh mahaadveep pashchim mein prashaant mahaasaagar, poorv aur dakshin mein atalaantik mahaasaagar aur uttar mein aarkatik mahaasaagar se ghira hua hai. uttar pashchim yeh Asia se lagbhag lagta hua hai jahaaain par 800 kimi ki bering ki khaadi ise Asia se pruthak karti hai. uttarapoorv mein greenalaind hai aur aaisalaind jo 480 kimi ki doori par hai. afreeka se uttar America ki niktatam doori 1,600 kimi hai aur Asia-prashaant ki doori 9,600 kimi hai.

uttar America ki pramukh nadi-ghaatiyaaain misisipi aur misori nadiyon se milkar bani hai aur in dono nadiyon ki sanyukt lambaai amejn nadi ke baraabar hai. nadi-ghaati ka kshetrafal 31,60,000 varg kilometer hai. vanaspati-jeevan is kshetr mein vishesh hai. udaaharan ke liye, uttari vanaspati mein aarkatik lichens, moses aur nimn jadi bootiyaaain vishisht hain. Canada aur America ke pashchimi vistaar mein konifr, vishesh roop se laal-lakdi, paain aur devadaar sammilit hain.

anukram

rooparekha

uttar America bhaugolik roop se paaainch mukhya kshetron mein vibhaajit kiya ja sakta hai:

(1) kanaadiyaai shield, jo bhoovaijnyaaanik roop se ek sthir kshetr hai jo praacheen pattharon se milkar bana hai aur yeh greenalaind sahit mahaadveep ka adhiktar uttar pashchimi bhaag ghere hue hai.

(2) appaalachiaans, ek bhoovaijnyaaanik roop se puraana aur ghisi pranaali jo gaaspe praayadveep se Alabama tak faili hui hai.

(3) Mexico ki khaadi, jismein nimn bhoomiyon ki ek shrrunkhala hai jo dakshini new inglaind se lekar Mexico tak faila hua hai.

(4) bheetari maidaan, jo mahaadveep ke madhya mein, mekenji ghaati se lekar Mexico ki khaadi ke maidaano tak faila hua hai aur ismein pashchim ke vishaal maidaan aur poorvi bhaag ke graameen kshetr bhi aate hain.

(5) antat: ameriki kordillera, jo parvaton aur nadi-ghaatiyon ki ek jatil shrrunkhala hai jo alaaska se lekar Mexico tak faili hui hai aur jiske antargat rauki parvat shreni bhi aati hai.

seenojoik kaal ke antim himyug ke dauraan, barf ne hadasan khaadi se lekar adhikaansh mahaadveep ko dhk liya. himnad rauki parvat maala aur siyera prashaant tak fail gaye. him ke khiskane ke chinh kai himyugi jheelon par rah gaye, jaise vishaal saalt jheel aur vishaal jheelein.

tateeya kshetr

uttar America ka poorvi tat atalaantik se lagta hua hai. adhikaansh mahaadveep uttar ameriki plate par sthit hai. haalaanki kuchh kshetr jaise kaileeforniya aur pashchimi Mexico prashaant plate mein sthit hain jo America ke saath saan endriyaas fault se sata hua hai.

s ra America ka mahaadveepeeya bhaugolik seva kendra baalta kasbe (uttar dakota) se 9.6 kimi ki doori par sthit hai.

kshetr aur jalavaayu

jalaalekh

ameriki nadiyaan do prakaar ki hain. ek ve jo prashaant mahaasaagar mein girti hain aur chhoti, tej aur bahut kataav poorn hain. iske vipreet atalaantik mahaasaagar mein girne waali nadiyaan lambi, bahaavadaar aur vishaal jalavibhaajan waali hain. inmein se kuchh sansaar ki sabse lambi nadiyaan hain. in do prakaar ki nadiyon ke atirikt aarkatik mahaasaagar mein girne waali nadiyaan is roop mein asaamaanya hai ki ve sardiyon mein jam jaati hain.

uttar America vishv ki kuchh vishaal jheelon ka ghar bhi hai. inmein se adhiktar himyugeen hain aur mukhyat: Canada mein pai jaati hain. iske atirikt Canada mein hajaaron chhoti-2 jheelein bhi hain.

nadi pranaali

uttar America mein vishv ki sabse adhik jheelein pai jaati hain. misisipi nadi mahaadveep ki sabse lambi nadi hai aur iska nadi kshetr 31.6 lakh varg kilometer ka hai. anya mahatvapoorn nadi hai sant lverans nadi, jiska jalanikaas kshetr 16 lakh varg kimi mein faila hua hai.

anya pramukh nadiyaan hain mekinji nadi aur kaupar nadi jo aarkatik mahaasaagar mein girti hain. iske atirikt charchil nadi, nelsan nadi, sevarn nadi aur albaano nadi jo atalaantik mahaasaagar mein girteen hain aur yukaun nadi, fraasar nadi, kolambiya nadi, sekraamento nadi, saan jo॑ukuin nadi aur koloredo nadi prashaant mahaasaagar mein girteen hain.

jalavaayu tatha vanaspati

uttar America ki jalavaayu praaroopik roop se thandi aur geeli hai. geela kshetr asangat roop se poore mahaadveep mein faila hua hai. vanaspati pratyek mausami kshetr ke anusaar badalti rahati hai. jaise-jaise bhoomadhya rekha ke kshetr se niktata badhti hai, vaise-vaise mausam mein parivartan aata hai. Mexico aur dakshini s ra America mein ushnakatibandheeya jatavaayu se lekar Canada aur uttari s ra America mein tundra jalavaayu pai jaati hai.

yeh bhi dekhein

baahari kadiyaaain