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Chipping Norton Limestone
Chipping Norton Limestone
Stratigraphic range: Bathonian; ~167–165 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Exposure of the Hook Norton Member at Hook Norton Cutting and Banks
Type	Formation
Unit of	Great Oolite Group
Underlies	Fuller's Earth & Sharp's Hill Formations
Overlies	Grantham, Northampton Sand & Whitby Mudstone Formations
Thickness	0–12 m (0–39 ft)
Lithology
Primary	Limestone
Other	Mudstone
Location
Coordinates	52°00′N 1°36′W / 52.0°N 1.6°W
Approximate paleocoordinates	41°36′N 8°48′E / 41.6°N 8.8°E
Region	England
Country	United Kingdom
Extent	North Gloucestershire, north Oxfordshire
Type section
Named for	Chipping Norton
	Chipping Norton Limestone (England) Chipping Norton Limestone (Oxfordshire)

The Chipping Norton Limestone is a geological formation in the Cotswolds, England. It preserves fossils dating back to the Bathonian (Middle Jurassic).^[1]^[2] Including those of dinosaurs Cetiosaurus, Megalosaurus and Cruxicheiros as well as the Tritylodontid Stereognathus. It primarily consists of ooidal limestone.

Fossil content

The so-called "Scrotum humanum" remains may have come from this formation.^[1]

Dinosaurs
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Alocodon^[3]	Indeterminate^[3]	Gloucestershire^[4]			Actually indeterminate ornithischian remains.^[4]
Cetiosaurus^[5]	C. giganteus^[6]	Oxfordshire^[6]			Actually indeterminate sauropod remains.^[6]
Cetiosaurus^[5]	Indeterminate^[5]	Gloucestershire^[4] Oxfordshire^[6]			Actually indeterminate sauropod remains.^[6]
Dromaeosauridae^[7]	Indeterminate^[7]	Oxfordshire^[7]	Woodeaton Quarry^[7]	"Teeth"^[7]	Indeterminate teeth. Remains represent three genera.^[7] Same species also present in the Forest Marble Formation.
Megalosaurus^[5]	Indeterminate^[5]	Gloucestershire^[4] ~~Oxfordshire~~^[6]			Oxfordshire remains later found to be from an indeterminate theropod.^[6]
Omosaurus^[6]	O. vetustus^[6]	Oxfordshire^[6]			Actually indeterminate stegosaur remains.^[6]
Phyllodon^[8]	Indeterminate^[8]	Gloucestershire^[4]			Actually indeterminate ornithischian remains.^[4]
Stegosauria^[4]	Indeterminate^[4]	Gloucestershire^[4]			Previously assigned to Stegosaurus sp. and (tentatively) Omosaurus vetustus.^[4]	"Scrotum humanum"
Streptospondylus^[6]	S. cuvieri^[6]	Oxfordshire^[6]		"Vertebrae [and] limb elements."^[9]	Actually indeterminate theropod remains.^[6]
Troodontidae^[7]	Indeterminate^[7]	Oxfordshire^[7]	Hornsleasow Quarry^[7]	"Tooth"^[7]	Specimen GCLRM G8-23.^[7]
Therizinosauroidea^[7]	Indeterminate^[7]	Oxfordshire^[7]	Hornsleasow Quarry^[7]	"Tooth"^[7]	Specimen GCLRM G167-32. First record of Therizinosauroidea in Europe.^[7]

Color key

Taxon	Reclassified taxon	Taxon falsely reported as present	Dubious taxon or junior synonym	Ichnotaxon	Ootaxon	Morphotaxon

Notes
Uncertain or tentative taxa are in small text; ~~crossed out~~ taxa are discredited.

References

^ ^a ^b Weishampel, David B; et al. (2004). "Dinosaur distribution (Middle Jurassic, Europe)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 538–541. ISBN 0-520-24209-2.
^ British Geological Survey. "Chipping Norton Limestone Formation". BGS Lexicon of Named Rock Units. Retrieved 2 June 2019.
^ ^a ^b Listed as "cf. Alocodon sp." in "10.3 Gloucestershire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Page 538.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j "10.3 Gloucestershire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Page 538.
^ ^a ^b ^c ^d "10.3 Gloucestershire, England; 2. Chipping Norton Formation" and "10.11 Oxfordshire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Pages 538,540.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o "10.11 Oxfordshire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Page 540.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r Wills, S.; Underwood, C. J.; Barrett, P. M. (2023). "Machine learning confirms new records of maniraptoran theropods in Middle Jurassic UK microvertebrate faunas" (PDF). Papers in Palaeontology. 9 (2). e1487. Bibcode:2023PPal....9E1487W. doi:10.1002/spp2.1487.
^ ^a ^b Listed as "cf. Phyllodon sp." in "10.3 Gloucestershire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Page 538.
^ "Table 4.1," in Weishampel, et al. (2004). Page 78.

Bibliography

Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.