Very few ESA coastal sites have been studied, but collectively these sites have the potential to clarify the earliest human dispersals within the southern African coastal plain and they may be significant for understanding the emergence and development of complex subsistence and technical behaviors associated to MSA.
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Evidence for Earlier Stone Age 'coastal use': The site of Dungo IV, Benguela Province, Angola.
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The sentences
We observed an important trend in the use of rolled quartz blocks, rather than cobbles and/or pebbles, which may be related to the intention of exploiting flatter and angular cortical surfaces—the cortical surface of cobbles and pebbles being more rounded.