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Metsimotlhabe river (Kumakwane~25 km from Gaborone), Botswana along the river bed. (Latitude
-24.69S and Longitude 25.71E).
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Predominantly coarse grained quartz with a few grains of chert and rock fragments,
Dominant dominant typically blocky, equant, translucent and milky-white, rarely yellowish yellowish monocrystalline
quarzquartz. Rare transparent clear quartz crystals Trace 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
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