The Estous Sandstone
Age: Upper part of the Campanian (70 My.)
Thickness: 10 metres
Fossils: Bone and egg fragments of Dinosaurs.
Description: This unit appears in relief between the units of the Lower red Marl formation. It is a massive sandstone, a few metres thick, with a lot of channels sometimes separated by thin red marl layers.
Large, deeply eroded fluvial channels filled with conglomerate and sandstone in the Estous Sandstone formation, Arques.