Speeton Clay Formation

Speeton Clay Formation
Stratigraphic range: Berriasian-Albian 145–100 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Speeton Clay Formation at Reighton Sands, North Yorkshire
Type	Geological formation
Unit of	Cromer Knoll Group
Sub-units	Members A to D
Underlies	Hunstanton Formation
Overlies	Kimmeridge Clay Formation
Thickness	100 m (330 ft) in outcrop
Lithology
Primary	Claystone
Other	Glauconite
Location
Coordinates	54°12′N 0°12′W / 54.2°N 0.2°W / 54.2; -0.2
Approximate paleocoordinates	41°00′S 9°18′E / 41.0°S 9.3°E / -41.0; 9.3
Region	Yorkshire
Country	United Kingdom
Extent	North Sea Graben, eastern England
Type section
Named for	Speeton
class=notpageimage| Location of the formation

The Speeton Clay Formation (SpC)^[1] 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.^[2]

The formation is named after the village of Speeton in North Yorkshire.