Dunkerque (Dunkerque Chalk)

Dunkerque (Dunkerque Chalk) is a type of soft, white limestone formed mainly from microscopic marine organisms' remains, deposited during the Cretaceous period. Found near Dunkerque in northern France, it consists primarily of fine-grained calcium carbonate. This chalk is valued for its use in construction, as a raw material in cement production, and in the arts for chalk and writing purposes. Its porous structure and purity make it suitable for various industrial applications, while its aesthetic and historical significance also contribute to its recognition.