Chipping Norton Limestone

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.

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	52.0°N 1.6°W
Approximate paleocoordinates	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)

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]
	Indeterminate[5]	Gloucestershire[4] Oxfordshire[6]			Actually indeterminate sauropod remains.[6]
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[7]	Indeterminate[7]	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."[8]	Actually indeterminate theropod remains.[6]

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.

See also

• List of dinosaur-bearing rock formations
• List of fossiliferous stratigraphic units in England

References

1. 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.
2. British Geological Survey. "Chipping Norton Limestone Formation". BGS Lexicon of Named Rock Units. Retrieved 2 June 2019.
3. Listed as "cf. Alocodon sp." in "10.3 Gloucestershire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Page 538.
4. "10.3 Gloucestershire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Page 538.
5. "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.
6. "10.11 Oxfordshire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Page 540.
7. Listed as "cf. Phyllodon sp." in "10.3 Gloucestershire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Page 538.
8. "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.