What is recorded here
Porth y Gwyddel on Ynys Môn (Isle of Anglesey) features rocks primarily composed of Silurian greywacke and volcaniclastic deposits, formed around 440–420 million years ago during the Caledonian orogeny. These rocks are part of the Môn Syncline and are notable for their exposure of ancient marine sediments and volcanic activity, offering insights into Wales' complex geological history.
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Places near here
Porth y GwinBay · 1036 yd
Porth RuffyddBay · 1164 yd
Standing Stones at Penrhosfeilw;Plas MeilwStanding Stone Pair · 1343 yd
Tŷ Mawr Hut CirclesArchaeological place · 1402 yd
RSPB South Stack Visitor CentreVisitor information · 1628 yd
South Stack Lighthouse ViewpointViewpoint · 1676 yd
Copper Mine CreekCopper Mine · 1737 yd
Ogof IronCave · 1.2 mi
CastellRuins · 1.2 mi_-_geograph.org.uk_-_8008154.jpg?width=1280)
Ynys Lawd / South StackIsland · 1.2 mi
South Stack LighthouseLighthouse · 1.2 mi
Porth DafarchBeach / strand · 1.3 miOther information
Photo: Eric Jones · CC BY-SA 2.0