The Ceibwr Bay Fault is a WSW-ENE trending

fault zone In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic f ...

that cuts

Ordovician The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era, and the second of twelve periods of the Phanerozoic Eon (geology), Eon. The Ordovician spans 41.6 million years f ...

rocks of the

Ashgill Ashgill is a village in South Lanarkshire, Scotland near Larkhall. It is part of the Dalserf parish. The village church dates back to 1889. It is twinned with Saint-Cirq-Lapopie in France. The village has a shop, a chip shop and a hairdress ...

Nantmel Mudstones Formation and the

Caradoc Caradoc Vreichvras (; Modern , ) was a semi-legendary ancestor to the kings of Gwent. He may have lived during the 5th or 6th century. He is remembered in the Matter of Britain as a Knight of the Round Table, under the names King Carados and C ...

Dinas Island Formation. The fault is exposed on the south side of

Cardigan Bay Cardigan Bay () is a large inlet of the Irish Sea, indenting the west coast of Wales between Bardsey Island, Gwynedd in the north, and Strumble Head, Pembrokeshire at its southern end. It is the largest bay in Wales. Geography Cardigan Bay ha ...

Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...

and forms part of the Fishguard-Cardigan Fault Zone. It extends from the coast at Ceibwr Bay at its western end to the coast at

Aberporth Aberporth is a seaside village, community (Wales), community and electoral ward in Ceredigion, Wales. The population at the 2001 Census, was 2,485, of whom 49 per cent could speak the Welsh language. At the 2011 Census, the population of the co ...

at its eastern end. The fault zone is thought to have been active as a normal fault throughout the deposition of the Ordovician sequence.

References

Geology of Wales Cardigan Bay {{Wales-geo-stub

See also

References