Creigiau Aberarth-Morfa
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Geology & landscape
Geological Period: Silurian
Description
Description These sea cliffs show excellent sections in the Aberystwyth Grits, of Llandovery (lower Silurian) age. These are representatives of southern outcrops of these strata, with thick greywacke units, graded bedding, convolute bedding and sole markings, all consistent with the turbidity-flow origin of these sediments. This is a key site for examining the mudrock-greywacke alternations of the Aberystwyth Grits and a range of sedimentary features which indicate their deposition in a comparatively deep-water marine trough during early Silurian times.