Implications of petrographic temper analysis for oceanian prehistory

Abstract

Petrographic examination of prehistoric Pacific potsherds in thin section allows robust distinctions to be drawn between indigenous temper sands derived from islands where sherds were collected and exotic temper sands derived from other islands, except that calcareous temper sands of reef detritus are undiagnostic of origin. Ceramic transfer or movement of ceramic raw materials from island to island can be detected because small islands serve as virtual point sources of noncalcareous terrigenous sands, and local island geology is controlled by systematic and well-known geotectonic patterns. Prehistoric Oceanian pottery was made locally on multiple islands, rather than being dispersed from a discrete number of ceramic centers, but limited ceramic transfer was widespread within nearly all island groups. As temper analysis is independent of ceramic typology, sherd tempers in common with obsidian artifacts and other manuports provide unambiguous physical evidence for migration, trade, or exchange within and between island groups.