What is recorded here
Porthygwichiaid on Ynys Môn (Isle of Anglesey) features Silurian-age volcanic and sedimentary rocks, part of the island’s ancient volcanic terrain formed around 440–420 million years ago. The area is notable for its well-exposed coastal sections that reveal the region’s complex geological history, including intrusive igneous activity and marine sedimentation.
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Places near here
Porth HelygenBay · 847 yd
Freshwater BayBay · 1107 yd
Tyllau Duon Slate Quarry, LlaneilianSlate Quarry · 1436 yd
Porth y CorwglLanding Point · 1587 yd
Bryn Fuches Farmhouse, Llys Dulas, AngleseyFarmhouse · 1595 yd
Ynys DulasIsland · 1.1 mi
Mynydd EilianMountain / peak · 1.1 mi
Traeth Dulas, Hulk / WreckWreck · 1.8 mi
Penysarn War MemorialMemorial · 2.1 mi
Lligwy BeachBeach / strand · 2.7 mi
Sail Loft, Iard Newydd, AmlwchSail Loft · 2.7 mi
Morris Brothers MemorialMonument · 2.8 miOther information
Photo: Eric Jones · CC BY-SA 2.0