The hill of Mirabeau corresponds to a large anticlinal fold (arched). This fold is cut by the Durance River into a narrow gorge, which provides a spectacular view of the internal structure of the fold on the right bank. Location: Mirabeau (84) Site type: Remarkable geological formation, Remarkable relief Parking: Available This large anticline is asymmetrical, tilted towards the northeast. Erosion has attacked its core to reach the marly layers of the Upper Jurassic, which are the oldest rocks in the Luberon Regional Park. Its flanks are composed of massive terminal Jurassic limestones. On its eastern flank, at the level of the bridge, the limestone layers are tilted vertically. The Durance River has cut through the fold perpendicular to its axis, a feature known [...]

This site reproduces and illustrates on a smaller scale what happens on a larger scale in the Luberon massif. It is a "miniature Luberon." Location: Vaugines (84) Site type: Remarkable geological formation Parking The site of Déboulière, sometimes called La Garrigue, is 2.5 kilometers long and 500 meters wide. It stands out distinctly in the landscape as a small hill emerging from the cultivated plains. This small structure is an anticlinal fold (arched up), situated in the midst of the Durance plain. The particularity of this anticlinal is observable on its southern flank: Hauterivian limestones, dating back 130 million years old, are covered by 20 million years old Miocene marine sands, and then, again, by Hauterivian limestones. The sands were deposited on the Lower [...]