The rocks around Llanbadrig are some of the oldest found in southern Britain: formed 570 million years ago.
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Caledonian structures (folds and fractures) exposed in coastal cliffs.
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Arenig-Llanvirn (Ordovician) rocks exposed in inland outcrops, coastal cliffs
Dinas Rhondda | Dinas Mawddwy | Madog II ap Gruffydd, Lord of Dinas Bran | Llanbadrig | Gruffydd II ap Madog, Lord of Dinas Bran | Dinas Cross | Castle An Dinas |