stillbay造句

• These Stillbay sites date back anywhere ranging from 72, 000 BP to 164, 000 BP.
• In the South African Middle Stone Age sequence culture it occurs following a gap of 7 ka after the Stillbay period.
• Fire was used for heat treatment of silcrete stones to increase their workability before they were knapped into tools by Stillbay culture.
• In southern Africa, we see the technocomplexes of Howiesons Poort and Stillbay, named after the sites at which they were first discovered.
• Humans of this period as in the earlier Stillbay cultural period showed signs of having used symbolism and having engaged in the cultural exchange of gifts.
• The last three years of her life were spent in Stilbaai ( sometimes spelled Stillbay ), South Africa, where she died on 2 May 1986.
• Researchers have concluded that Stillbay people prepared the silcrete stone out of which they made their stone tools with preheating in human made fire to increase its workability.
• It contains one of " most complete and continuous later Middle Stone Age sequences in southern Africa " stretching from before 130, 000 BP to about 45, 000 BP and encompassing pre-Stillbay, Stillbay, Howiesons Poort, and post-Howiesons Poort periods.
• It contains one of " most complete and continuous later Middle Stone Age sequences in southern Africa " stretching from before 130, 000 BP to about 45, 000 BP and encompassing pre-Stillbay, Stillbay, Howiesons Poort, and post-Howiesons Poort periods.