The information on this page is a summary description.
The full formal description is available here: Vitrival-Bruyère Formation
Abbreviation
VTB
Parent unit
Child units
Lithological description
Blackish, silky and fine micaceous shale with quartzite intercalations and graptolites (Maillieux, 1926a); micaceous pelitic unit (Michot, 1928); the higher part contains clayey quartzitic sandstone in thick beds, covering black or blue shale with intercalations of black or dark coloured mudstone, siltstone and fine sandstone.
Age
Graptolites in a locality at Vitrival-Bruyère in the upper part of the unit indicate the Climacograptus peltifer biozone (Maillieux, 1933). A restudy of the fauna by Bulman (1950) confirmed the presence of the Climacograptus peltifer biozone (now equivalent to the foliaceus biozone), which is situated in the uppermost Costonian to lower Longvillian substages, uppermost Aurelucian and most of the Burrellian stages, Caradoc (Fortey et al., 1995).
Thickness
Not estimated yet, except for the upper part with quartzite beds: 20-30 m.
Area of occurrence
Condroz inlier; possibly the Oxhe Fm is a lateral equivalent or synonym for the unit in the Oxhe inlier.
Type locality
Outcrops in the river bed of the Ruisseau Le Treko, west of the hamlet La Bruyère, 500 to 1050 m east of the church of the village Vitrival.
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 Vitrival-Bruyère Formation, 01/01/2001. National Commission for Stratigraphy Belgium. https://ncs.naturalsciences.be/lithostratigraphy/Vitrival-Bruyere-Formation
