The information on this page is a summary description.
The full formal description is available here: Grand Breux Formation
| Abbreviation | GBR |
| Parent unit | none |
| Child units | Bieumont Member, Lion Member, Boussu-en-Fagne Member |
| Lithological description | Nodular limestone passing upwards to greenish-grey shale with calcareous nodules, passing laterally to large lense-like grey limestone bodies. |
| Age | Middle Frasnian |
| Thickness | c. 120 m in the type area |
| Area of occurrence | Southern limb of the Dinant Synclinorium, between Trélon (France) to Bomal-sur-Ourthe, south-eastern margin of the Durbuy-Philippeville Anticlinorium. |
| Type locality | Composite stratotype composed of the CouvinCharleroi railway trench for the Bieumont and Boussu-en-Fagne members, and the disused Lion quarry for the eponymous member, in Frasnes-lez-Couvin. |
| Alternative names | none |
| Authors | Mottequin, B., Denayer, J., Delcambre, B., Marion, J.-M. & Poty, E. |
| Date | 23/09/2025 |
| Cite as | Mottequin, B., Denayer, J., Delcambre, B., Marion, J.-M. & Poty, E., 2025. The Grand Breux Formation, 23/09/2025. National Commission for Stratigraphy Belgium. https://ncs.naturalsciences.be/lithostratigraphy/Grand-Breux-Formation |
| Additional information |
