Akheka kanjani amadwala?
Amadwala akhiwa ngamadwala ancibilikile avela ezintabeni-mlilo. Lapho i-lava ipholile kwakheka umhlaba omusha ngemva kokuba usuqinile. Amadwala e-sediment akheka lapho izinhlayiya ezisemkhathini zihlala ngenxa yemvula, noma lapho amaminerali avela emanzini ehlangana futhi abangela izikali zamaminerali. Futhi uba namadwala lapho izingqimba zomhlaba (isib. ukungcola) zakha phezu komunye nomunye futhi zicindezela izingqimba ezingaphansi kwazo izigidi zeminyaka.