added by archaeologs Stratified site of long occupation, located 80 km southwest of Pittsburgh near Avella, Pennsylvania. Occupation extends from at least 14,000 be to historic times. Charcoal samples in the lowest stratum have yielded dates in the range 35,000 to 19,500 be, although there was no association with cultural material. Flint tools bearing a resemblance to finds at Blackwater Draw and Lindenmeier, for example, the Mungai knife and a carbonized fragment of what may have been a basket, were contained in lower stratum IIA, with radiocarbon dates of 16,350-17,950 be. Such evidence established beyond reasonable doubt the presence of a human population south of the ice masses in the Late Pleistocene.
The Macmillan dictionary of archaeology, Ruth D. Whitehouse, 1983