Craiglwyd Quarry, Penmaenmawr, Conwy, Wales, UKi

Regional Level Types
Craiglwyd Quarry	Quarry (Active)
Penmaenmawr	Community
Conwy	County Borough
Wales	Country
UK	Country

A now abandoned granite quarry on the site of Britain's third most productive Prehistoric (third millennium BC) stone axe factory.

Modern workings on the outcrop date to 1833. Within a decade, independent quarries had been developed, Graiglwyd on the eastern flank and Penmaen on the western flank. The quarries were amalgamated in the early 1900s although work stopped at Graiglwyd quarry in the late 1930s when the eastern workings were abandoned.

Sargent (1925) described axinite at Graiglwyd Quarry occurring in three assemblages: axinite+prehnite+quartz; axinite+pectolite; and axinite+zoisite+quartz. Specimens from this location in the National Museum of Wales Collection have been shown to be ferro-axinite.

The current quarry still occupies the western part of the outcrop and has potential reserves until the mid 2000s.

Ref.:
Sargent, H.C. (1925): Notes on the petrology of the Penmaenmawr Intrusion (Part II). Proceedings of the Liverpool Geological Society, 14, 123-142.

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