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Llech Gron is a prehistoric standing stone located in Wales and protected as a scheduled monument by Cadw under reference CD093. The stone rises from bedrock composed of Llandovery rocks, an undifferentiated formation of sandstone and conglomerate laid down during the Llandovery epoch of the Silurian period, approximately 444 to 419 million years ago. This geological foundation of interbedded sedimentary layers reflects the ancient marine environment in which these rocks formed.
Standing stones of this type were typically erected during the Bronze Age, though some may be later Neolithic in origin. They served various purposes within prehistoric communities, functioning as territorial markers, ritual monuments or waypoints across the landscape. The survival of Llech Gron into the present day, despite centuries of agricultural and social change, reflects both its cultural significance to successive generations and the durability of stone as a monument material.
The monument's protection under Cadw ensures its preservation for future study and understanding of Wales's prehistoric heritage. The local geology of sandstone and conglomerate would have been readily available for selection and quarrying by its builders, making Llech Gron an integral feature of its natural landscape and a testament to the enduring relationship between prehistoric communities and their physical environment.
Llech Gron is a scheduled monument protected by Cadw under reference CD093. View the official record →
Llech Gron is a prehistoric standing stone located in Wales and protected as a scheduled monument by Cadw under reference CD093.
Llech Gron dates from the prehistoric period, and is classified as a standing stone. It is one of over 32,000 scheduled monuments protected across the UK.
Llech Gron 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 CD093.
Several scheduled monuments lie within 10 km, including Aberstrincell or Graiglas Limekilns (4.2 km), Trichrug Round Barrows (5 km), Castell Allt Craig-Arth (5.4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Llech Gron'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.
Llech Gron stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is sandstone and conglomerate, interbedded.