This paper provides the first radiocarbon date from
CA‑LAN-1, also known as the Tank Site. This important prehistoric site, long considered the “type site” for the Milling Stone Horizon (MSH), had never previously been radiocarbon dated. Some six decades after the site was first investigated, we provide the date and its specific context, its conventional and calibrated ages, and discuss the significance of this singular date to southern California prehistory.
