Levalloisian

O'Brien regards the Still-Bay as the final development of the Levalloisian, and, like Leakey, assigns it to the end of the Gamblian pluvial.

Purely Levalloisian stone tools which might be called classic models have been found in the Altai and Unst’-Kansk caves on the Charysh and Strashnaya rivers (in the Tigerek mountains).