The information on this page is a summary description.
The full formal description is available here: Génicot Formation
Abbreviation
GNC
Parent unit
Child units
Lithological description
Black shale, dark grey laminated siltstone and often thin beds of medium grey sandstone. Occasionally a conglomeratic sandstone bed occurs. Sometimes dark-coloured microbioturbations a few mm long (Chondrites sp.?) are present in the shale or siltstone. The base of the formation is located above the highest macrofossiliferous horizon of the Fosses Fm, the top of the formation above the highest siltstone/sandstone bed below the Criptia Group, in which a clear green-grey shale appears.
Age
Early to mid Llandovery, based on one graptolite level (Michot, 1927) from the Monograptus convolutus biozone, Aeronian (mid Llandovery).
Thickness
At least 150-200 m.
Area of occurrence
Puagne-Sart-Eustache area, in the southern structural unit of the western part of the Condroz inlier.
Type locality
Not defined yet; area between the city of Fosses and the village Sart-Eustache.
Alternative names
Authors
Verniers, J., Herbosch, A., Vanguestaine, M., Geukes, F., Delcambre, B., Pingot, J.-L., Belanger, I., Hennebert, M., Debacker, T., Sintubin, M. & De Vos, W.
Date
01/01/2001
Cite as
Verniers, J., Herbosch, A., Vanguestaine, M., Geukes, F., Delcambre, B., Pingot, J.-L., Belanger, I., Hennebert, M., Debacker, T., Sintubin, M. & De Vos, W., 2001. The Génicot Formation, 01/01/2001. National Commission for Stratigraphy Belgium. https://ncs.naturalsciences.be/lithostratigraphy/Genicot-Formation
Additional information
The relation with the similar Faulx-les-Tombes Mbr with its “schistes mouchetés” (Fosses Fm) is not yet understood.
