What is recorded here
Carreg Alltrem is a sea cliff composed of Silurian greywacke and shale, formed around 440–420 million years ago through sedimentation and subsequent tectonic compression. It is notable as part of the Caledonide mountain belt, reflecting ancient marine deposits uplifted during the collision of tectonic plates.
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Places near here
Cwm PenamnenForest · 904 yd
Y Ro WenMountain / peak · 1001 yd
Ysbyty Ro Wen Cairns & WallsCairn Cemetery · 1126 yd
Tan-y-bwlchCliff · 1145 yd
Ysbyty y Ro Wen WallWall · 1211 yd
Dolwyddelan stationHeritage place · 1436 yd_-_geograph.org.uk_-_240588.jpg?width=1280)
A470 and Benar (Wood)Forest or wood · 1.1 mi
Heather-clad hill above Bwlch y GroesMountain or hill · 1.1 mi
DrosgolMountain / peak · 1.2 mi
Castell DolwyddelanCastle · 1.5 mi
Dolwyddelan CastleCastle · 1.5 mi
A mine adit into a cliff face and a ruined mine buildingCliff or headland · 2.4 miOther information
Photo: Jeff Buck · CC BY-SA 2.0