What is recorded here
The Thumb Boulder is shown as a named rock on the public map of Gwynedd. The saved point is the map point or the centre of its mapped shape.
The Thumb Boulder is a notable coastal rock feature, likely composed of metamorphic or igneous rock, formed during the Caledonian orogeny around 400–500 million years ago. Its distinct shape and prominent position along the coast make it a recognizable landmark in the area.
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Places near here
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Penrhyn Great Strike Memorial, High Street, BethesdaCommemorative Monument · 719 yd
Tyn-y-ffridd Quarry from the brow of the hillMountain or hill · 862 yd
Moel FabanMountain / peak · 1321 yd
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Zip World Penrhyn QuarryHeritage attraction · 1.0 mi
LlefnMountain / peak · 1.2 mi
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