Dalle aux Arenaygues = stone flowers witnessing the Devonian 360million years ago. Jean Pierre Dugene discovered it in 2010. Rare circular structures with a radiating shape reminiscent of a cartwheel. In the center of the structure is the opening of a chimney for the escape of water and sand, fossilized. These structures were created during an earthquake in sediments of detrital origin deposited in the shallow sea. These 'Arenaygues' are considered to be the most characteristic and best preserved specimens in the world. Ossau Valley, Pyrenees, France