Mahhala

I-Antarctica inesikhathi esingakanani iqhwa?

I-Antarctica inesikhathi esingakanani iqhwa?

I-Antarctica yayingambozwe yiqhwa neqhwa, kodwa phakathi nenkulungwane yeminyaka iye yashintsha isuka ekubeni ihlathi elineqhwa yaba ugwadule oluyiqhwa.

I-Antarctica yaqala ukuba nezinguzunga zeqhwa ekupheleni kwesikhathi se-Devonian, cishe eminyakeni eyizigidi ezingu-350 edlule. Kodwa yayisahlotshaniswa namandla amakhulu kaGondwana ngaleso sikhathi, futhi kunoma yikuphi isimo sezulu sasingabanda ngokwanele ukuba sibe yiqhwa ngokuphelele. Kukhona izinsalela zezitshalo kusukela kule nkathi. Amaqhwa eqhwa ancibilika isikhashana ngemva kwalokho, futhi kwaze kwaba yilapho i-Afrika ne-Antarctica ihlukana cishe eminyakeni eyizigidi ezingu-160 edlule lapho aqala khona ukuncipha futhi. Eminyakeni eyizigidi ezingu-23 edlule, i-Antarctica yayiyihlathi leqhwa futhi iminyaka eyizigidi ezingu-15, yayiwugwadule oluyiqhwa ngaphansi kweqhwa eliwugqinsi.

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