Why this matters
Carreg Ddiddos is a coastal rock feature located in Ceredigion, likely composed of Silurian greywacke or similar sedimentary rock, formed around 440–420 million years ago through deep marine deposition and subsequent uplift. It is notable as a named landmark on local maps, indicating its recognition in the regional cultural or geographical landscape.
What is recorded here
Carreg Ddiddos is shown as a named rock on the public map of Ceredigion. The saved point is the map point or the centre of its mapped shape.
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