Falaises des Vaches Noires

The Falaises des Vaches Noires are a stretch of coastal cliffs on the Normandy coast of northwestern France between the seaside towns of Villers-sur-Mer and Houlgate, notable for exposed sedimentary layers and abundant marine fossils. They are a regional geological landmark and a frequent subject of paleontological study.

The foreshore reveals bands of clay, sand, and chalk that contain fossils such as ammonites and belemnites; these fossil beds are most visible at low tide when wave action and coastal erosion expose new material. The cliffs extend along the Côte Fleurie for several kilometres and present steep, eroding faces with talus slopes below where rockfall and slumping periodically expose fresh strata.

The exposed sediments date to the Late Jurassic through the Early Cretaceous, and ongoing coastal erosion continually reveals fossils and geological sections used by scientists to study the period. Human activity has centered on safe viewing and scientific collecting rather than large-scale excavation; the site is primarily valued for its natural exposures rather than constructed features.

The cliffs sit on the Calvados coast of Normandy, on the channel-facing shore between Villers-sur-Mer and Houlgate. Public promenades and beach access at those towns provide the usual starting points for visits; parking and coastal facilities are concentrated in the towns rather than at the cliffline itself.

• Low-tide exposure: Best explored at low tide when fossil-bearing layers on the foreshore are exposed and visible.
• Access points: Accessible viewpoints and promenades at the neighbouring seaside towns provide safe viewing and entry points to the cliff foot.