3.8 Ethe Formation - ETH

Author: Dewalque, 1854.

Description: Grey marl and silty clay, often laminar. Locally, limonitic nodules.

Stratotype: Latour borehole; good outcrop in a old brick-factory, Toernich street, Arlon.

Area and thickness: Belgian Lorraine. The thickness of the formation varies between 20 and 25 m in the west of the Belgian Luxemburg. In the eastern area, it can reach about 50 m.

Age: Ethe Formation is limited to Pliensbachian, and generally corresponds to the Prodactylioceras davoei Zone (Maubeuge, 1954).