The information on this page is a summary description.
The full formal description is available here: Lonzée Member
| Abbreviation | LON |
| Parent unit | Chalk group |
| Child unit | |
| Lithological description | From bottom to top: – basal grey to green clay-silt, overlying Silurian bedrock, with many moulds of bivalves and gastropods; – grey-green glauconitic clay-silt, with planar bedding; no macrofossils; – blue clay with numerous bivalves, belemnites, shark teeth, teleosts, mosasaurs (thickness: up to 60 cm); – fine grey sand with large blocks of glauconitic sandstone with many bivalves, belemnites, microfauna etc.(thickness: 145 cm); – glauconitic, dark green-blue clays, with many bivalves, belemnites, shark teeth, fish vertebrae (thickness: 20 cm); – indurated calcarenite and sand (thickness 15 cm); – yellowish green or brown, glauconitic, very sandy clay, with numerous silicified shell fragments (thickness: 30 cm) |
| Age | ? Coniacian Santonian – ? basal Campanian: Cephalopods: Actinocamax verus, Gonioteuthis westfalica westfalica, G. westfalicagranulata, G. granulata, ? G. granulataquadrata. Inoceramids: Inoceramus (Heroceramus) cf.hercules, I. (Volviceramus) cf.koeneni |
| Thickness | About 3 m (unpublished section drawn by M. Glibert in 1936). |
| Area of occurrence | Known occurrence of this member is restricted to the area around Lonzée near Gembloux (Namur). |
| Type locality | No stratotype fixed; at present there are no outcrops in the succession. |
| Alternative names | |
| Authors | Robaszynski, F., Dhondt, A.V. & Jagt, J.W.M. |
| Date | 01/01/2001 |
| Cite as | Robaszynski, F., Dhondt, A.V. & Jagt, J.W.M., 2001. The Lonzée Member, 01/01/2001. National Commission for Stratigraphy Belgium. http://ncs.naturalsciences.be/lithostratigraphy/Lonzee-Member |
