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Howieson's Poort Shelter
Howieson’s Poort Shelter is a small rock shelter in South Africa containing the archeological site from which the Howiesons Poort period in the Middle Stone Age gets its name. This period lasted around 5,000 years, between roughly 65,800 BP and 59,500 BP.
This period is important as it, together with the Stillbay period 7,000 years earlier, provides the first evidence of human symbolism and technological skills that were later to appear in the Upper Paleolithic.
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==Description==
The rock shelter occurs in a hill on the north side of the Howieson's Poort containing the main road into Grahamstown from Port Elizabeth.〔A ''poort'' in South African English is a mountain pass or gap, usually cut by a stream or river. 〕 The cave is halfway up a cliff and is deep and wide at the mouth, with a large Real Yellowwood tree growing in the deposit and “bent horizontal with the floor to allow its branches to spread into the open at the mouth of the shelter”.〔 The original Howiesons Poort period remains were covered very slowly due to the cave’s position halfway up the cliff and to wind clearance. 20000 years ago, however, a rock fall acted to protect the deposits near the front from wind erosion.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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