Assessment of the state of conservation of a Middle Neolithic flint mine in Maastricht limestone

Upper Cretaceous Maastricht limestone ("mergel") outcrops in the provinces of Dutch and Belgian Limburg. The Upper Cretaceous in the Netherlands consists of the geological Maastricht Formation and the upper part of the Gulpen Formation. Limestones from the Maastricht Formation represent one of the few native Dutch natural stones used for...