The Calcaires de Laize is a Cambrian limestone unit that crops out in Normandy, France. It was deposited during a sea level highstand, and overlies the siliciclastic schists and limestones of Carteret.Doré F. 1972. La transgression majeure du Paléozoïque inférieur dans le Nord-Est du Massif Armoricain. Bull. la Soc. Geol. Fr. 7:79–93.
It is magnesium rich and penetrated by pre-Jurassic barites veins.
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