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′N1°36′W / 52.0°N 1.6°W / 52.0; -1.6
Approximate paleocoordinates	41°36′N8°48′E / 41.6°N 8.8°E / 41.6; 8.8
Region	England
Country	United Kingdom
Extent	North Gloucestershire, north Oxfordshire
Type section
Named for	Chipping Norton
Chipping Norton Limestone (England) Show map of England Chipping Norton Limestone (Oxfordshire) Show map of 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]
	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.

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. 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 .
8. Listed as "cf. Phyllodon sp." in "10.3 Gloucestershire, England; 2. Chipping Norton Formation," in Weishampel, et al. (2004). Page 538.
9. "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.