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3.2.7. Barvaux Formation - BAR

Authors: Gosselet, 1880b; Coen, 1999.
Description: Violet shales, slightly nodular in the lower and upper part; some levels are characterized by large cyrtospiriferids and coquinoid and sandy layers. Reddish mudmounds occur locally in the lower part.
Stratotype:Railway section south of Barvaux, west of Biron.
Area: Mainly south-eastern border of the Dinant Synclinorium up to the Sy-Hamoir area and also in the most eastern part of the southern border of the Dinant Synclinorium (Houyet).
Thickness: About 90 m in the type area.
Age: Late Frasnian to early Famennian; Upper rhenana to Lower triangularis conodont Zones (Coen, 1999).