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Amgueddfa Cymru
This stone has two faces that were worn, polished and slightly concave indicating this could have been used as a grinding or polishing stone. It was also fire cracked either before or after its use as a tool.
It is Lithology A: Pale grey, unfossiliferous, well sorted, fine to very coarse grained orthoquartzite, commonly with granules and occasionally with small pebbles of vein-quartz. The rock is lightly to moderately cemented with secondary quartz and has a marked porosity. This is the most common Lithology of the Severn Estuary sites.
Enw'r Safle: Peterstone, Peterstone Wentloog
