Qhov laj thawj ncaj qha ntawm kev tsim cov roob Appalachian yog kev sib koom ua ke ntawm txhua lub teb chaws mus rau sab av loj Pangea raws li Iapetus Dej hiav txwv kaw 290 lab xyoo dhau los. B altica thiab North America tau sib koom ua ke los tsim kev tsim cov poj koob yawm txwv qaum teb Appalachians.
Cov xwm txheej twg tsim lub roob Appalachian?
Dej hiav txwv continued mus txog, txog 270 lab xyoo dhau los, lub teb chaws uas yog poj koob yawm txwv mus rau North America thiab Africa sib tsoo. Cov pob zeb loj loj tau raug thawb mus rau sab hnub poob raws li cov npoo ntawm North America thiab muab sib sau ua cov roob uas peb tam sim no paub tias yog Appalachians.
Thaum twg Appalachian Roob tsim?
Ib txoj kev tshawb fawb tshiab pom tias cov txheej txheem uas tsim lub roob Appalachian 300 lab xyoo dhau los zoo ib yam li cov txheej txheem tsim lub Himalayas niaj hnub no. Lub Roob Appalachian: Cov kws tshawb fawb tau tsim daim duab tshiab ntawm kev sib tsoo sab av loj uas tsim cov Appalachians yav qab teb.
Qhov txhaum twg tsim lub roob Appalachian?
Ntau pua lab xyoo tom qab ntawd, cov phiaj xwm Asmeskas thiab African sib tsoo (lub Appalachian Orogeny), ua rau lub roob Appalachian. (Cov Appalachians muaj hnub nyoog ntau dua li peb Rocky Roob uas pib tsim txog 60 lab xyoo dhau los.) Cov Appalachians muaj sab qab teb thiab sab qaum teb.
Dab tsi ua rau lub roob Appalachian dhau lossib npaug?
Txawm hais tias kev sib tsoo ntawm cov teb chaws ua rau tsim lub roob Appalachian, cov npoo ntawm North America tam sim no yog qhov tshwm sim ntawm a thim rov qab hauv cov phaj crustal txav. Tom qab cov teb chaws sib tsoo, lub teb chaws loj pib sib nrug.
