3 - Four Mile Bridge to Trearddur
Maen Yr Esgyll
Fine faulted cliffs with Maen Yr Esgyll one of the small islands offshore.
The rocks of Precambrian age are known as the South Stack Formation.
In an area on the northern gently-dipping limb of the Rhoscolyn Anticline.
Ref: NW 738
Date: 27/04/2022
Location: SH 2591 7521
