Coed Cochion Quarry is a Site of Special Scientific Interest (SSSI) in Carmarthenshire, Wales, in which the geology of the site has preserved rare Precambrian fossils.
SSSI Coed Cochion Quarry SSSI is a very small quarry of located approximately south of Llangynog and north of Llanybri, north-east of the Taf Estuary.
The site is a rare example in the world of Precambrian fossil records - greater than 0.5 billion years old - found in the ashy siltstone sedimentary rock. A number of fossils of medusoid creatures - visually like, but maybe not in fact contemporary jellyfish - are present, as are feeding trails of other creatures. The evidence is that the site was once a sandy, silty shoreline in which soft-bodied fauna became buried.
See also List of Sites of Special Scientific Interest in Carmarthenshire
References
External links SSSI Citation for Coed Cochion Quarry Citation map for Coed Cochion Quarry Your Special Site and its Future - Coed Cochion Quarry SSSI overview from Natural Resources Wales Coed Cochion Quarry SSSI marked on DEFRA's MAGIC Map