3.2 Habay Formation - HAB

Authors: Boulvain et al. (2001).

Description: Alternation of conglomerate, sand, argillaceous sand, conglomeratic dolomite and clay, generally brick-red, sometimes greenish. This unit, with a marked continental character, rests unconformably on the Devonian basement. Its thickness is, consequently, locally variable.

Stratotype: Latour borehole.

Area and thickness: The formation outcrops in the north of Belgian Lorraine. It still appears westerly of the Rossignol meridian, down to the Chiny Forest. Its thickness increases gradually towards the east and the south to reach about 30 m at the meridian of Attert. Near the French border, the formation displays about the same thickness in subsurface (Latour borehole).

Age: Until now, no dating method has provided a specific age of the formation. Depending on the authors, it is assigned a Permian or a Triassic age.