3 - Four Mile Bridge to Trearddur
Porth Gwalch - 1
A view over Porth Gwalch towards Rhoscolyn Head
Precambrian rocks of the South Stack formation with Holyhead quartzite (with some red staining) above.
Ref: NW 740
Date: 27/04/2022
Location: SH 2577 7536
