Chipping Norton Limestone Explained

Chipping Norton Limestone
Type:	Formation
Age:	Bathonian ~
Period:	Bathonian
Prilithology:	Limestone
Otherlithology:	Mudstone
Namedfor:	Chipping Norton
Region:	England
Country:	United Kingdom
Coordinates:	52°N -1.6°W
Paleocoordinates:	41.6°N 8.8°W
Unitof:	Great Oolite Group
Underlies:	Fuller's Earth & Sharp's Hill Formations
Overlies:	Grantham, Northampton Sand & Whitby Mudstone Formations
Thickness:	0-
Extent:	North Gloucestershire, north 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.

Dinosaurs
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Alocodon^[3]	Indeterminate	Gloucestershire^[4]			Actually indeterminate ornithischian remains.
Cetiosaurus^[5]	C. giganteus	Oxfordshire^[6]			Actually indeterminate sauropod remains.
	Indeterminate	Gloucestershire Oxfordshire			Actually indeterminate sauropod remains.
Dromaeosauridae^[7]	Indeterminate	Oxfordshire	Woodeaton Quarry	"Teeth"	Indeterminate teeth. Remains represent three genera. Same species also present in the Forest Marble Formation.
Megalosaurus	Indeterminate	Gloucestershire Oxfordshire			Oxfordshire remains later found to be from an indeterminate theropod.
Omosaurus	O. vetustus	Oxfordshire			Actually indeterminate stegosaur remains.
Phyllodon^[8]	Indeterminate	Gloucestershire			Actually indeterminate ornithischian remains.
Stegosauria	Indeterminate	Gloucestershire			Previously assigned to Stegosaurus sp. and (tentatively) Omosaurus vetustus.
Streptospondylus	S. cuvieri	Oxfordshire		"Vertebrae [and] limb elements."^[9]	Actually indeterminate theropod remains.
Troodontidae^[10]	Indeterminate	Oxfordshire	Hornsleasow Quarry	"Tooth"	Specimen GCLRM G8-23.
Therizinosauroidea^[11]	Indeterminate	Oxfordshire	Hornsleasow Quarry	"Tooth"	Specimen GCLRM G167-32. First record of Therizinosauroidea in Europe.

See also

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

References

Bibliography

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

Notes and 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. .
2. Web site: Chipping Norton Limestone Formation . . BGS Lexicon of Named Rock Units . 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 . Papers in Palaeontology . 9 . 2 . e1487 . 10.1002/spp2.1487. free . 2023PPal....9E1487W .
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.
10. Wills . S. . Underwood . C. J. . Barrett . P. M. . 2023 . Machine learning confirms new records of maniraptoran theropods in Middle Jurassic UK microvertebrate faunas . Papers in Palaeontology . 9 . 2 . e1487 . 10.1002/spp2.1487. free . 2023PPal....9E1487W .
11. Wills . S. . Underwood . C. J. . Barrett . P. M. . 2023 . Machine learning confirms new records of maniraptoran theropods in Middle Jurassic UK microvertebrate faunas . Papers in Palaeontology . 9 . 2 . e1487 . 10.1002/spp2.1487. free . 2023PPal....9E1487W .