Roche à l'Appel in Muno
A world famous geological curiosity. The remarkable thing of this site here is the contact between the rocks of the Paleozoic (primary) and of the Mesozoic (secondary). Three geological eras come together here. They are separated by 2 major discrepancies, on the one hand, the Caledonian orogeny and, on the other hand, the Hercynian orogeny. It is exceptional to observe this phenomenon in such a small area, hence the celebrity of Muno. The "Roche à l'Appel" consists of a chaotic accumulation of large blocks of Fépin pudding stone. This natural concrete is one of the oldest rocks in Belgium which come to the surface. The rare association of lichens, mosses and ferns that are bound to a rocky biotope, makes this site a truly unique place.
Pano from 3 photos.