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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
quarz. 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.
!botswana_river_macro_1200.jpg|thumbnail,align=left!Glass bead is 200µ in diameter.
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