Shaping of the landscapes

Here, many pebbles cover the ground. It is limestone fragments torn from the Luberon due to repeated freezing and thawing during the last cold phase of the quaternary. These deposits, called "gélifracts" are very common in the limestone mountains where they can reach up to 40m of thickness! In this quaternary period, the mountain streams have also shaped the landscape, by either deeply digging their beds or by accumulating sediments, under the influence of climatic variations.