A calcareous mudstone.https://depositsmag.com/wp-admin/admin.php?page=pms-basic-info-page Related Articles: Flints in the Late Cretaceous Chalk of NW EuropePlenty of geological fun at Cornwallis’ CaveThe geology and fossils of the Burnham Chalk Formation (Upper Cretaceous, Upper Turonian stage) of North Ormsby, LincolnshireA field guide to Barbados (Part 1): IntroductionA field guide to Barbados (Part 3): Northern Barbados« Back to Glossary Index