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Amgueddfa Cymru – Museum Wales
This stone has a smooth and concave face indicating it could have been used as a rubber before becoming fire-cracked.
Lithology D: Comprised of assorted medium to very coarse-grained orthoquartzites. The rocks are hard and compact, with no significant porosity.
Site Name: Peterstone, Peterstone Wentloog
Notes: Unstratified
