Sediments (River bed formation (boulders))
Gneisses and sands (main aq. weathered gravely sand and clay)
Metamorphic (weathered biotite and feldspathic gneisses)
Rounded pebbles with calcareous shales (Turkana grits)
Basements (weathered/ fractured epidotised gneisses)
Riverbed sediments (Coarse grained sands with pebbles)