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Hoyle Mouth Cave is a prehistoric rock shelter located in Wales, formed within the Dinantian limestone bedrock that underlies the site. The cave's geology comprises the Mississippian-age Dinantian rocks, a sequence of limestone with subordinate bands of sandstone and argillaceous material. This limestone base has weathered and eroded to create the natural cavity that attracted human occupation in prehistoric times.
The cave sits within a geological formation typical of upland Welsh karst landscapes, where soluble limestone is naturally prone to cave development. The Dinantian rocks, deposited during the Carboniferous period, create conditions favourable for the formation of such shelters, and their distribution across Wales means caves like Hoyle Mouth would have been recognisable landmarks in the prehistoric environment.
The site is protected as a heritage monument by Cadw, the Welsh heritage organisation, under the reference PE427. This designation reflects its archaeological significance as evidence of human activity and settlement patterns in prehistoric Wales. The cave's preservation allows study of how ancient populations utilised natural rock shelters within the distinctive limestone geology of the Welsh landscape.
Hoyle Mouth Cave is a scheduled monument protected by Cadw under reference PE427. View the official record →
Hoyle Mouth Cave is a prehistoric rock shelter located in Wales, formed within the Dinantian limestone bedrock that underlies the site. It is designated a Scheduled Ancient Monument by Cadw under reference PE427.
Hoyle Mouth Cave dates from the prehistoric period, and is classified as a cave. It is one of over 32,000 scheduled monuments protected across the UK.
Hoyle Mouth Cave is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is PE427.
Several scheduled monuments lie within 10 km, including First World War Practice Trenches, Penally Range (1.8 km), Whitewell (2.1 km), The Old Palace, Lydstep (3.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Hoyle Mouth Cave's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Hoyle Mouth Cave stands on Dinantian Rocks (Undifferentiated), bedrock that formed in the Mississippian. The rock here is limestone with subordinate sandstone and argillaceous rocks.