 The majority are heavily weathered Kartan stone tools weighing up to with over 400 found around the large camp, indicating late Pleistocene occupation with various smaller tools gradually replacing them over time.Although Kartan tools are traditionally made of Quartzite, often sourced from great distances, all of the finds at Hallett Cove were made of Siltstone despite large amounts of suitable Quartzite being available on the beach.During the late Pleistocene, the sea level was around lower than today.