▁the ▁collision ▁of ▁the ▁F alk land ▁Pl ate au ▁into ▁the ▁south ▁of ▁what ▁was ▁to ▁become ▁Africa ▁when ▁it ▁was ▁part ▁of ▁G ond w ana . ▁These ▁series ▁of ▁parallel ▁fol ds ▁are ▁in ▁the ▁form ▁of ▁an ▁" L ", ▁with ▁the ▁western ▁section ▁running ▁north – s outh , ▁and ▁the ▁eastern ▁section ▁running ▁east – west , ▁for ▁a ▁total ▁length ▁of ▁about ▁ 8 0 0   km . ▁The ▁right ▁angle ▁of ▁the ▁" L " ▁occurs ▁in ▁the ▁south - western ▁corner ▁of ▁the ▁country , ▁just ▁in land ▁from ▁the ▁Cape ▁Pen ins ula ▁and ▁Cape ▁Town . ▁These ▁fol ds ▁lie ▁along ▁the ▁coast line ▁in ▁the ▁south ▁and ▁are ▁not ▁much ▁more ▁than ▁ 1 0 0   km ▁wide ▁in ▁total ▁along ▁most ▁of ▁their ▁length . ▁In ▁the ▁west ▁they ▁are ▁separated ▁from ▁the ▁coast ▁by ▁a ▁pron ounced ▁coast al ▁plain . ▁ ▁The ▁flo ors ▁of ▁the ▁long ▁valle ys ▁between ▁the ▁parallel ▁mountains ▁ranges ▁consist ▁of ▁fert ile ▁so ils ▁composed ▁of ▁weather ed ▁mud st ones ▁belonging ▁to ▁the ▁B ok ke vel d ▁Group ▁of ▁the ▁Cape ▁Super group , ▁as ▁opposed ▁to ▁the ▁nut ri ent - po or , ▁sand y ▁so ils ▁on ▁the ▁quart z it ic ▁sand stone ▁mountains , ▁on ▁either ▁side ▁of ▁the ▁valle ys . ▁However , ▁the ▁ra inf all ▁is , ▁in ▁general , ▁low , ▁border ing ▁on ▁the ▁sem iar id ▁(