Neocomian

& 8. [From Lat. Neocomium Neufchâtel.] A. As adj.: Of or belonging to Neufchâtel, or the rocks there typically represented. [B.] B. As substantive: Geol.: A European name for the Lower Greensand formation, the inferior part of the Cretaceous system. Lyell divides it into Upper, Middle, and Lower Neocomian; the Upper contains the Folk est one and Hythe beds of the southeast of England with the Kentish rag intercalated, the whole le than three hundred feet thick. Beneath this is the At her field clay, gray in color, of great thickne at At her field, in the Isle of Wight. Part of the Speeton clay, several hundred feet thick, is also Neocomian. Under the Middle division are ranked the Weald clay, the Middle Speeton, and Tealby beds. Tealby is a village in Lincoln shire. The Lower Neocomian contains the Hastings sand, pa ing into Purbeck beds of the Jura ic series, and the lower Speeton clay, the latter two hundred feet thick. Remains of Plesiosaur us and Teleosaur us have been found in the Upper Speeton clay and Pecten cinct us , various Ammonites, ., in other beds. The lower Neocomian is homotaxic with the yellow sandstone of Neufchâtel.