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6.3 Sautou Formation - SAU (old: Rv4)

Author: Beugnies, 1960.
Description: Thick beds of black pyritic quartzite of 5 to 10 m thick, separated by layers of coarse sandy and silty slate, or more rarely of graphitic fine slate or of chloritoid-bearing slate (Beugnies, 1960).
Stratotype: not yet defined; type area in the outcrops east and north of the Sautou castle, north-east of Bosseval, specially in the Terne de la Borne valley.
Area: Givonne Massif.
Thickness: 250 m (Beugnies, 1960).
Age: Unfossiliferous: undated till now.