Mergelgrube

A marl pit is an artificially created well that served to break marls. Merge pits are particularly common in Haute-Normandy, in the Cretaceous plateau of the Pays de Caux.

Pays de Caux edit source text → Hauptartikel: Country of Caux

In the 19th century, the Cauchois dug hundreds of shafts into the high-altitude cretaceous layers to remove the lower marl. The shafts were 10 to 30 meters deep and led to distances of 10 to 20 meters in length and 2 to 3 meters in height. They were replenished when they were dismantled. Their location was only to be identified by trees planted here. In the course of time (and through the land consolidation) these individual trees have disappeared in the midst of wide fields and with them the memory of these small mines.

Erosion and dissolution processes sometimes lead to lowering and collapsing, the so-called collapse points. Single-level Edit source text Edit source text Weblinks Edit sourcetext Commons: Merge pits - collection of pictures, videos and audio files

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