周辺の天然記念物・トップ13

A gravel path. A bit monotonous and technically challenging to ride on a bike. Wide tires are essential, and suspension is helpful. The view is fantastic. The cliffs of Ault are in front of you, the sea is to your right, and the nature reserve (salt marshes) is to your left, with many seabirds, horses, and other wildlife.

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Here in Ault begin the chalk cliffs, which stretch all the way to Normandy and repeatedly appear as enormous cliffs.

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The bay of summer, on our trip it was low tide.

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The cliffs around the beach of Ault are composed of chalk from the Upper Cretaceous, more precisely from the Turonian and Coniacian (around 83 million years ago to 90 million years ago). They are strewn with flint nodules which highlight the subhorizontal stratification planes (the formation of flint has already been discussed in Discovery of the geology of the cliffs of Étretat, presentation of an excursion from the beach of Tilleul (Antifer) to the Porte d'Amont (Étretat Nord)). The relative proportion of chalk and flint is around 90-95% chalk to 5-10% flint. Flint horizons are stratigraphic markers. On the cliffs of Ault, the regular flint band called Seven Sisters is recognizable and characterizes the boundary between the Middle Coniacian and the Upper Coniacian (around 87 million years ago). The boundary between the lower and middle Coniacian is marked by the Shoreham 2 marl level, which is more difficult to identify. These lithostratigraphic markings allow in particular the correlation of distant deposits, such as between the Normandy and Picardy coasts, or between the French and English coasts.

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Great panorama, but also depressing how fleeting everything is.

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Stork not very afraid of our presence seen on the side of the road.

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The town of Ault is located in a valley (a small valley which was created in a setback of cliffs). The succession of white chalk cliffs continues on the Normandy coast.

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If you're looking for a breathtaking view of the Parc du Marquenterre, a nature reserve that hosts hundreds of migratory birds, don't miss this belvedere where a wooden platform offers a 360-degree view of the park and the Bay of Somme . It is the ideal place to enjoy the beauty and tranquility of nature.

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