The Speeton Clay Formation (SpC)Speeton Clay Formation - BGS is a Lower Cretaceous geological formation in Yorkshire, northern England. Unlike the contemporaneous terrestrial Wealden Group to the south, the Speeton Clay was deposited in marine conditions. The most common fossils in the unit are belemnites, followed by ammonites and the lobster Meyeria ornata. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.Weishampel, et al. (2004). "Dinosaur distribution." pp. 517–607.
The formation is named after the village of Speeton in North Yorkshire.
Fossil content The following fossils have been reported from the formation:Speeton Clay Formation at Fossilworks.org Reptiles Ichthyosaurs Acamptonectes densusFischer et al., 2012bFischer et al., 2012a Neornithischians Owenodon hoggiiNorman & Barrett, 2002 Iguanodontia indet.Mulder & Fraaije, 2016 Sauropterygians Elasmosauridae - "Speeton Clay plesiosaurian"Benson & Druckenmiller, 2014 Fish Cretorectolobus doyleiUnderwood et al., 1999 "Dasyatis" speetonensisUnderwood et al., 1999 "Protosqualus. sp" Notidanodon lanceolatusUnderwood et al., 1999 Notorhynchus aptiensisUnderwood et al., 1999 Synechodus dubrisiensisUnderwood et al., 1999 Spathobatis rugosusUnderwood et al., 1999 ?Sphenodus sp.Underwood et al., 1999 "Elops" neocomiensisUnderwood et al., 1999 Pycnodontidae indet.Underwood et al., 1999 Semionotidae indet.Underwood et al., 1999 Teleostei indet.Underwood et al., 1999 ?Triakidae indet.Underwood et al., 1999 Invertebrates Crustaceans Martillepas auriculumGale, 2019 Crinoids Crinoidea indet.Underwood et al., 1999
See also List of dinosaur-bearing rock formations List of stratigraphic units with indeterminate dinosaur fossils
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