Scalby Formation

Scalby Formation
Stratigraphic range: Bathonian PreꞒ Ꞓ O S D C P T J K Pg N ↓
exposure of the Scalby Formation near Scalby, North Yorkshire
Type	Geological formation
Unit of	Ravenscar Group
Sub-units	Moor Grit Member, Long Nab Member
Underlies	Cornbrash Formation, Osgodby Formation
Overlies	Scarborough Formation
Thickness	up to 60 metres (200 ft)
Lithology
Primary	Moor Grit Member - Sandstone Long Nab Member - Mudstone, Siltstone
Other	Moor Grit Member - Mudstone, Siltstone Long Nab Member - Sandstone
Location
Region	Europe
Country	UK
Extent	North Yorkshire
Type section
Named for	Scalby, North Yorkshire
Location	Scalby Cliff

The Scalby Formation is a geological formation in England. Part of the Ravenscar Group, it was deposited in the Bathonian stage of the Middle Jurassic. The lower Moor Grit Member has a lithology consisting of medium to coarse grained cross bedded sandstone, with thin beds of mudstone and siltstone, while the upper Long Nab Member has a lithology consisting of predominantly laminated mudstone and siltstone, with fine to medium grained planar and cross stratified sandstones.[1]

Fossilized dinosaur tracks have been found in the Scalby Formation; these include a recently discovered footprint from a large theropod, probably a megalosaurid. The track is from the Long Nab Member, and has been assigned to the ichnogenus Megalosauripus.[2]

References

1. "Scalby Formation". BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 7 August 2018.
2. Hudson, J.G.; Romano, M.; Lomax, D.R.; Taylor, R.; Woods, M. (16 February 2023). "A new giant theropod dinosaur track from the Middle Jurassic of the Cleveland Basin, Yorkshire, UK". Proceedings of the Yorkshire Geological Society. 64 (3) – via Lyell Collection.