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The river flows through waterberg group of rocks, which are an assemblage of sandstones,
conglomerates and siltstones. This is continental red bed sediments
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Predominantly coarse grained quartz with a few grains of chert and rock fragments, dominant typically blocky, equant, translucent and milky-white, rarely yellowish monocrystalline quartz. Rare transparent clear quartz crystals; trace quantitites of epidote, rutile, zircon, sphene and possibly garnet. Most grains are coated with an FeOx cutane. FeOx minerals (goethite ?) precipitated repeatedly from groundwater after sand was occasionally moistened and capillary water evaporated 
Glass bead is 200µ in diameter.
Texture:
Medium-grained (mL, 250-350µ), poorly sorted, subangular-subrounded
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