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 Rethinking the Antiquity of Bedrock Mortars on the Central California Coast

  • Author(s):  Jones,  Terry L.
  •  Lebow,  Clayton G.
  • et al.
Abstract

Previous assessments of the age of bedrock mortars (BRMs) on the central California coast have limited them to post cal A.D. 1250 contexts. Recent investigations from a single-component late Middle Period site with associated bedrock mortars (CA-SLO-5) on the San Luis Obispo coast, and the stratigraphic position of a bedrock mortar cup beneath dated midden residues at Swordfish Cave (CA-SBA-503) in northern Santa Barbara County, indicate that these features were used as early as 1,385 cal B.C. and that their overall age encompasses the late Early, Middle, Middle-Late Transition, and Late/Early Historic periods in this region.

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