What is recorded here
Porth yr Hwch on Ynys Môn (Isle of Anglesey) features coastal rocks primarily composed of Silurian greywacke and mudstone, formed around 440–420 million years ago during sedimentary deposition in an ancient marine environment. The area is notable for its well-exposed cliffs that provide insight into the geological history of the Welsh Caledonides.
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Places near here
Porth yr Hwch FachBay · 175 yd
Ynys y FydlynIsland · 430 yd
PenbrynyreglwysMountain / peak · 445 yd
Carmel HeadVisitor information · 661 yd
Carmel Head MineMine · 856 yd
Gader: ChimneyChimney · 879 yd
Porth-y-DyfnBay · 882 yd
Coal Rock Pilot Beacons, Carmel HeadBeacon · 1102 yd
Bryn GoelcerthFarmstead · 1.1 mi
Ogof LowryCave · 1.3 mi
Mynydd y GarnMountain / peak · 1.7 mi
William Thomas MonumentMemorial · 1.7 miOther information
Photo: Gordon Hatton · CC BY-SA 2.0