Grinding and Milling: A Study of Romano-British Rotary Querns and Millstones Made from Old Red Sandstone

This work investigates the use of Old Red Sandstone from South Wales, Gloucestershire, Avon and Somerset during the Roman period, for rotary querns. It is based on detailed petrographic studies of these rocks at both microscopic and macroscopic levels to define practical keys which allow types of Old Red Sandstone, and hence artefacts made from it, to be identified and provenanced to their geological formations. 1200 rotary querns of Old Red sandstone from 180 sites were analysed (stretchin...