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3.2.17. Franc-Waret Formation - FRW

Authors: Stainier, 1892; Lacroix, 1999e.
Description: Greenish-greyish shales with a few calcareous-dolomitic beds overlaying either the Rhisnes Fm or Aisemont Fm and overlaid either by sandy beds or by an oolithic hematite.
Type area: Franc-Waret, about 10 km north-east of Namur. Because of the poor nature of the exposures a formal stratotype cannot be designated.
Area: northern border of the Namur Synclinorium.
Thickness: about 10 m.
Age: Latest Frasnian - ? Early Famennian.