The latter are merely partly drowned fringes of the mainland, with similar contours, while the former are recent formations which often rise abruptly from the true ocean bed.
Kamva nje inxenye yarhaxwa kumqaqo welizwe ngokwalo ngaphandle kweziqithi namanye amazwe aphantsi kwalo ezibufana nekhonto, ngelixa yena umqali kutsha nje ukwakhiwa elithe lakhawuleza ngendlela ekrwada ukusuka kolwenyani ulwandlekazi elizinzileyo.