Isku darka geeddi-socodkan wuxuu dib u warshadeyn ku sameeyaa lafaha badaha. Dib-u-warshadayntan awgeed, inta badan dhulka baddu wuxuu ka yar yahay 100 Ma. Lafaha ugu da'da weyn ee baddu waxay ku yaalliin Galbeedka Baasifigga waxaana lagu qiyaasaa inay yihiin 200 Ma. Marka la barbardhigo, lafaha ugu da'da weyn ee taariikhda leh waa 4,030 Ma. Toddoba saxan oo waaweyn waa Pacific, North American, Eurasian, African, Antarctic, Indo-Australian, iyo South American.
saxanada badaha