Idolobha laseSan Francisco lakhiwa kanjani?
Context:Kuze kube yisikhathi sokugcina seqhwa, lesi sigodi manje esigcwele iSan Francisco Bay sasiyisihosha esikhulu esiqondile esinamagquma amancane, afana nalawo amaningi ezigodini zaseCost Ranges. Njengoba izingqimba ezinkulu zeqhwa zaqala ukuncibilika, eminyakeni engaba ngu-11 000 edlule, ulwandle lwaqala ukukhuphuka. Ngo-5000 B.C. izinga lolwandle lase likhuphuke ngamamitha angu-90, lagcwalisa isigodi ngamanzi avela ePacific. Lesi sigodi saba igquma, kanti amagquma amancane aba iziqhingi.
Eminyakeni engaba ngu-11 000 edlule umhlaba waqala ukuncipha nokuncibilikisa izingqimba ezinkulu zeqhwa, wakhuphula izinga lolwandle futhi wagcwalisa isigodi lapho iGulf yaseSan Francisco ihlala khona manje.