Abstract
We describe the spatial context, technology, and possible function of serpentine-antigorite artifacts discovered at the Ust-Karakol Early Upper Paleolithic site in the Altai Mountains. The ornaments were made locally, with a single manufacturing process. They were fragmented either at the preform stage or at the stage of final trimming. There are no use-wear traces. The chaine operatoire included the preparation of blanks, biconical drilling, and polishing. Because the material is fragile, drilling ofpreforms preceded their polishing. This approach was also used with artifacts made of other fragile materials, such as ostrich eggshell, widely employed in the Paleolithic of North and Central Asia. Reconstructed techniques of manufacturing serpentine ornaments belong to the technological repertoire of the Early Upper Paleolithic Ust-Karakol tradition in the Altai. The petrographic analysis of magmatic rocks of the Bashchelak and Anuy mountain ranges suggests that serpentine could have been local. The potential sources include gabbroid deposits related to the Devonian and Permian magmatism of the region.
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