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Short-term sediment accumulation directly on basalt flows without the damming of drainage is not well studied. Can lakes form on basalt surfaces during times of volcanic quiescence between outpourings? Large faulted downthrown blocks of the lower Jurassic Kalkrand basalt within the Hardap Recreational Resort in central Namibia provided depressions for sediment accumulation during two periods of volcanic quiescence. The sedimentary infill was preserved as two sedimentary interlayers from 6 to 8 m in thickness between lava flow units. These sedimentary rocks, formerly interpreted as dominantly lacustrine deposits, now can be recognized as alluvial fill because of the presence of pedogenic...

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