The Prehistory of Nubia, Volume 1

absolute elevation Acheulean appear artifacts assemblage atypical backed backed microblades bank basal truncations base bifaces blades broken Burins butt cent chert collection compared complete concave convex Corbicula cores cortex covered denticulates deposits distal east edge End-scrapers evidence examples excavated faceted ferrocrete flat formation fossil four fragments gravel Guichard Halfa Index Indices industry inverse Khormusan lateral length less Levallois flakes Locality lower major material measure Middle Mousterian natural Nile notches NOTES Nubian Nubian Mousterian oblique truncations occur Paleolithic pebble pieces platform Pleistocene points possible preparation present range rare relatively remains represented Restricted retouch sand sandstone scrapers Sebilian Second seen shape side Side-scrapers silt similar simple single slightly specimens stage stone straight surface TABLE technological thick tion transverse truncations types typical typological Upper wadi