Glageon Quarry (Le Cailloit Quarry), Avesnes sur Helpe, Nord, Nord-Pas-de-Calais, France

Quarry in limestones of Frasnien (Upper Dévonian) age.
These very folded and fractured limestones contain calcite and dolomite. Occasionally one finds there also pyrite, marcasite, baryte, and goethite.

The quarry produces aggregates for public works and concrete. Exploited since 1860. It is currently owned by the Company of the Careers Bocahut de Glageon who ensures the extraction and the marketing of the aggregate. The quarry site is closed, supervised and access is prohibited without authorization of the management.