Moskvoretskaya Formation

Moskvoretskaya Formation
Stratigraphic range: Bathonian ~168–167  Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Sub-units	Meshchera Member
Underlies	Callovian and Oxfordian marine claystones
Overlies	Unconformably (about 150 Ma) overlying and infilling Middle Carboniferous limestone
Area	Kolomensky District, Moscow Oblast
Thickness	Variable
Lithology
Primary	Claystone, siltstone
Other	Sandstone
Location
Coordinates	55°12′N38°48′E / 55.2°N 38.8°E / 55.2; 38.8
Approximate paleocoordinates	48°48′N41°12′E / 48.8°N 41.2°E / 48.8; 41.2
Region	Moscow
Country	Russia
Extent	Localized in karstified limestones
Type section
Named for	Moskva River
Moskvoretskaya Formation (Russia) Show map of Russia Moskvoretskaya Formation (Moscow Oblast) Show map of Moscow Oblast

The Moskvoretskaya Formation is a Middle Jurassic (Bathonian stage) geologic formation in the European part of Russia. It consists of continental claystones, siltstones and sandstones deposited in karstified segments of underlying Middle Carboniferous limestone, that would have formed underground aquifers.

The formation is divided up into two members, the lower consists of dark clays to silts and is highly fossiliferous, while the upper member is sandy and lean in fossil content. ^[1]

The remains of indeterminate tetanuran dinosaurs are known from the formation. As are fossil flora, fish and abundant remains of the turtle Heckerochelys romani , ^[2] and various other fossils. ^[3]

Fossil content

Amphibians

Amphibians
Genus	Species	Location	Stratigraphic position	Material	Notes
Urodela	Gen. et sp. indet.	Peski locality. [4]		A fragmentary trunk vertebra. [4]	A crown salamander.

Reptiles

Turtles

Turtles
Genus	Species	Location	Stratigraphic position	Material	Notes
Heckerochelys	H. romani	Moscow	Kolomna		A stem turtle belonging to Mesochelydia. [2]

Crocodyliforms

Neosuchians
Genus	Species	Location	Stratigraphic position	Material	Notes
Neosuchia	Gen. et sp. indet.	Moscow	Kolomna	Vertebrae, teeth, dentary fragment	[1]

Lepidosauromorpha

Lepidosauromorpha
Genus	Species	Location	Stratigraphic position	Material	Notes
Lepidosauromorpha	Indeterminate	Peski		Left maxilla	Previously referred to the choristodere Cteniogenys . Similar to Marmoretta and Fraxinisaura. [5]

Dinosaurs

Dinosaurs
Genus	Species	Location	Stratigraphic position	Material	Notes
Tetanurae	Gen. et sp. indet.			Includes a partial skull, tooths and postcranial elements	Formerly referred to Richardoestesia and Coelurosauria [1] [6]

Therapsids

Therapsids
Genus	Species	Location	Stratigraphic position	Material	Notes
Morganucodontidae?	Gen. et sp. indet.			Femur	[7]

Fish

• Ceratodus segnis
• Ischyodus cf. egertoni ^[1]
• Hybodus sp. ^[1]
• Lepidotes sp.
• Ptycholepis sp.
• Dapediidae indet.

Flora

• Cedrus sp.
• Picea sp.
• Pinus sp.
• Bennettitales indet.
• Cyatheaceae indet.
• Cycadales indet.
• Gingkoales indet.
• Gleicheniaceae indet.
• Peltaspermales indet.

Other

• Scyadopitys verticillata
• cf. Gobiops sp.
• Caudata indet.

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with indeterminate dinosaur fossils
• List of fossiliferous stratigraphic units in Russia
• Mitchell Plain, karst field in Mississippian limestone in Indiana, United States
• Bemaraha Formation, Bathonian dinosaur-bearing formation of Madagascar
• Itat Formation, Middle Jurassic fossiliferous formation of Western Siberia

References

1. Pashschenko et al., 2018
2. Sukhanov, 2006
3. Moskvoretskaya Formation at Fossilworks.org
4. Skutschas, Pavel P.; Kolchanov, Veniamin V.; Sennikov, Andrey G.; Syromyatnikova, Elena V. (2022-10-19). "Discovery of a crown salamander in the Middle Jurassic (Bathonian) Moskvoretskaya formation of the Moscow Region, Russia". Historical Biology. 35 (11): 2123–2126. doi:10.1080/08912963.2022.2133605. ISSN   0891-2963. S2CID   253036062.
5. Skutschas, Pavel P.; Sennikov, Andrey G.; Syromyatnikova, Elena V.; Vitenko, Dmitriy D.; Parakhin, Igor A.; Bapinaev, Roman A.; Evans, Susan E. (2021-06-09). "A lepidosauromorph specimen from the Middle Jurassic (Bathonian) Moskvoretskaya Formation of the Moscow Region, Russia" . Historical Biology. 34 (3): 566–570. doi:10.1080/08912963.2021.1935921. ISSN   0891-2963. S2CID   236282947.
6. Alifanov & Sennikov, 2001
7. Lopatin & Averianov, 2006

Bibliography

• Pashchenko, D.I.; Kuzmin, I.T.; Sennikov, A.G.; Skutschas, P.P.; Efimov, M.B. (2018), "On the Finding of Neosuchians (Neosuchia, Crocodyliformes) in the Middle Jurassic (Bathonian) Deposits of the Moscow Region", Paleontological Journal , 52 (5): 550–562, Bibcode:2018PalJ...52..550P, doi:10.1134/S0031030118050118, ISSN   0031-0301 , retrieved 2019-10-12
• Lopatin, A.V.; Averianov, A.O. (2006), Mesozoic mammals of Russia, 9th International Symposium on Mesozoic Terrestrial Ecosystems and Biota, Abstracts and Proceedings Volume 67-70
• Sukhanov, V.B (2006), "An archaic turtle, Heckerochelys romani gen. et sp. nov. from the Middle Jurassic of Moscow region, Russia", Fossil Turtle Research , 1: 112–118, retrieved 2019-10-12
• Alifanov, V.R.; Sennikov, A.G. (2001), "Discovery of dinosaur remains in a Moscow suburb", Doklady Earth Sciences , 376: 1–3, doi:10.1023/A:1018811305425 , retrieved 2019-10-12

Further reading

• Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN   0-520-24209-2 , retrieved 2019-02-21