• Exhibits

    Artifact of the Week: Stone Bowl-Mortar

    Stone bowl mortars were the perfect tool for processing acorns, which had to be pounded into a meal and rinsed to remove bitter tannin. Mortars were also carved into bedrock near oak trees. Bowl mortars were more portable and could…

  • Exhibits

    Artifact of the Week: Grinding Tools

    Grinding tools of granitic stone were common for the Late Prehistoric Tradition. Local inhabitants used them to grind clay in preparation for pottery, acorns, and other foodstuffs. About 3,500 years ago, the region experienced a long period of widespread drought,…

  • Exhibits

    Artifact of the Week: Donut Stones

    A very unique object found at La Jolla Tradition sites is donut stones.¬† These are finely crafted tools that must have required hours of work. The exact use of donut stones is unknown. It is thought that these were used…

  • Exhibits

    Artifact of the Week: Grinding Stones

    Grinding tools were used to process many materials, not just seeds. The grinding table is called the netherstone, and the tool held in the hand is called the handstone. This netherstone and handstone are examples of ground stone tools. There…

  • Exhibits

    Artifact of the Week: Stone Bowls

    These stone bowls were found underwater many miles off shore. Their exact use is not known, but they indicate that the people of the Middle Holocene had ocean going boats. These bowls date to the La Jolla Tradition. During this…

  • Exhibits

    Artifact of the Week: Scrapers and Choppers

    During the Middle Holocene, local inhabitants heavily utilized coastal resources. Scrapers and choppers were very useful tools for processing shellfish, cutting wood, and smashing animal bone. Most stone choppers and scrapers from the La Jolla Tradition are made of quartzite.…