Traeth Llyfn, Pembrokeshire

Traeth Llyfn is an attractive west-facing sandy beach on the north Pembrokeshire coast, viewed here looking north from the coastal path. The cliffs are mostly in the dark grey Aber Mawr Shale Formation (Ordovician), steeply dipping to vertically bedded, with a few thin tuff bands (volcanic ash bands). There are igneous intrusions at the north end of Traeth Llyfn: (a) a dolerite/gabbro sill which forms the un-named northern headland to the bay and (b) a thin dolerite sill just a bit to the south which is visible in the photo forming the white-weathering rib just left of centre.

Access to Traeth Llyfn is by boat or by a bracing walk along the cliff top path from Abereiddi Bay 3/4 of a mile away. There are no facilities here and no vehicular access. So it is very unspoiled.