The filling of wetlands

As you descend from the lake, you will notice the grassy and flat stretches of terrain. The ancient glacier has gouged out depressions in the bedrock. When the ice retreated, these areas became lakes. Just like the Lac du Génépy, alluvium has filled these depressions, the hygrophilous vegetation then colonised these wetlands. Some of these areas then dried up to become small grassy plateaus amid the ´rocky ground´.