The info below is extracted from the following excellent resource:
https://kokelaargower.com/towards-stonehenge-the-anglian-glaciation-of-gower/
The pebbles illustrated below have all come from Gower raised beaches -- derived from many different places. I'm particularly struck by the Ramsey Island connection -- as flagged up here by somebody who knows the igneous rocks of that island particularly well. Some of these look very familiar -- I have seen them in abundance on the Pembrokeshire beaches, and also on Flat Holm in the middle of the Severn Estuary.
Silicic volcanic and shallow-intrusive rocks -- probably mostly from Ramsey Island
Mafic intrusive and extrusive rocks -- mostly from NW Pembrokeshire and maybe Skomer island
Diverse igneous erratics -- some from North Pembrokshire coast, Skomer and possibly Scotland
Silicic and intermediate intrusive rocks -- from Ailsa Craig and other distant sources
For further details on the provenances and rock types, please consult Peter's blog -- link as above.
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