Situated above the Vingeanne gorges, on the other side of the A31, this marsh has formed on an outcrop of marl; a curious, soft rock, full of oyster debris. One only has to bend down near a puddle in the marsh to discover oyster shells, but also terebratules and other brachyopods. These fossils remind us that the marls of the Rosière marsh were formed at the bottom of a deep sea. This marsh also has a rare fauna and flora, such as the pneumonant gentian and the butterfly that feeds on it.
Acces reserved for an informed and respectful public
All year except in hunting period.
- No admission charge.