Photo : Papagon / Wikimedia Commons (CC BY 4.0)
Champ de Roches
It lies between Gérardmer and Granges-sur-Vologne. An imposing moraine flow (moraines are rock fragments torn from the relief by glaciers) 500 m long, the Granges-sur-Vologne rock field, spreading at 740 metres' altitude, is the remnant of an ancient glacier that is said to have melted abruptly during an interglacial warming at the start of the Quaternary era. Having been colonised by no vegetation all this time, this geological curiosity consists of countless granite blocks, piled pell-mell to a height of 7 to 8 metres! Their little-blunted edges show that these stones have not been rolled and have remained relatively angular. Coming from the Vosges summits, varied granites and even sandstone dot the site, which cuts a straight gash of several hectares in the heart of a forest sheltering bracken!
