Ukureyskaya Formation

Ukureyskaya Formation
Stratigraphic range: Bajocian–Tithonian, 169–144 Ma

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Ukureyskaya Formation; Stratigraphic range: Bajocian–Tithonian, 169–144 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Sub-units	Lower, Middle and Upper subformations
Underlies	Utanskaya Formation
Overlies	Kulindinskaya Formation
Thickness	Several hundred metres
Lithology
Primary	Sandstone, siltstone, tuffite
Other	Mudstone
Location
Coordinates	52.5°N 116.7°E
Approximate paleocoordinates	58.0°N 117.2°E
Region	Zabaykalsky Krai
Country	Russia
Extent	Zabaykalsky Krai
	Ukureyskaya Formation (Russia) Ukureyskaya Formation (Zabaykalsky Krai)

The Ukureyskaya Formation, also referred to as the Ukurey Formation is a geological formation made up of Middle Jurassic and Late Jurassic layers.[1] It covers large areas around Kulinda. The formation is where the type specimen fossils of Kulindadromeus zabaikalicus were found, alongside a single tooth from a medium-sized theropod of unknown affiliations and other indeterminate ornithschians.[2] Recent dating work suggest that the layers containing Kulindadromeus are Bathonian in age.[3]

References

Sinitsa, S.; Reshetova, S.; Vilmova, E. (2017). "Hypostratotypes of Ukureyskaya Formation of Novoberezovka and Olov Depressions of Transbaikalia (Part 1. Hypostratotype-1 of Ukureyskaya Formation of Novoberezovka Depression)". Transbaikal State University Journal (in Russian). 23 (6): 52–62. doi:10.21209/2227-9245-2017-23-6-52-62. ISSN 2227-9245.
"The Kulinda fossil site", University of Bristol Palaeobiology Research Group. Retrieved 4 April 2015
Cincotta, Aude; Pestchevitskaya, Ekaterina B.; Sinitsa, Sofia M.; Markevich, Valentina S.; Debaille, Vinciane; Reshetova, Svetlana A.; Mashchuk, Irina M.; Frolov, Andrei O.; Gerdes, Axel; Yans, Johan; Godefroit, Pascal (2019-02-01). "The rise of feathered dinosaurs: Kulindadromeus zabaikalicus , the oldest dinosaur with 'feather-like' structures". PeerJ. 7: e6239. doi:10.7717/peerj.6239. ISSN 2167-8359. PMC 6361000. PMID 30723614.

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[1] Sinitsa, S.; Reshetova, S.; Vilmova, E. (2017). "Hypostratotypes of Ukureyskaya Formation of Novoberezovka and Olov Depressions of Transbaikalia (Part 1. Hypostratotype-1 of Ukureyskaya Formation of Novoberezovka Depression)". Transbaikal State University Journal (in Russian). 23 (6): 52–62. doi:10.21209/2227-9245-2017-23-6-52-62. ISSN 2227-9245.

[2] "The Kulinda fossil site", University of Bristol Palaeobiology Research Group. Retrieved 4 April 2015

[3] Cincotta, Aude; Pestchevitskaya, Ekaterina B.; Sinitsa, Sofia M.; Markevich, Valentina S.; Debaille, Vinciane; Reshetova, Svetlana A.; Mashchuk, Irina M.; Frolov, Andrei O.; Gerdes, Axel; Yans, Johan; Godefroit, Pascal (2019-02-01). "The rise of feathered dinosaurs: Kulindadromeus zabaikalicus , the oldest dinosaur with 'feather-like' structures". PeerJ. 7: e6239. doi:10.7717/peerj.6239. ISSN 2167-8359. PMC 6361000. PMID 30723614.