| Kaylaka Formation | |
|---|---|
| Stratigraphic range: Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N | |
| Type | Geological formation |
| Unit of | Eastern Fore-Balkan Zone |
| Underlies | Kamendel Formation |
| Overlies | Mezdren Formation and Dobrina Formation |
| Lithology | |
| Primary | Limestone |
| Location | |
| Coordinates | 43°09′N 26°32′E / 43.15°N 26.53°E / 43.15; 26.53 |
| Region | Shumen Province and Vratsa Province |
| Country |  Bulgaria |
| Extent | Bisserna Cave and Labirinta Cave |
  Kaylaka Formation (Bulgaria) | |
The Kaylaka Formation, also known as the Kajlâka Formation, is a Late Cretaceous (Maastrichtian) geologic formation located within Bisserna Cave, Shumen, and Labirinta Cave, Vratsa Province, both in Bulgaria.
History
Most of the fossils found in the Kaylaka Formation were discovered in 1985, and were described in 2006; the hadrosauroid specimen was not described until 2024.
Paleofauna
- Anapachydiscus (Menuites) cf. terminus
- Anomotodon sp.
- Elasmosauridae? indet.
- Hadrosauroidea indet.
- Hemipneustes striatoradiatus
- Hoploscaphites constrictus
- Mosasauridae indet.
- Mosasaurus cf. hoffmanni
- Squalicorax pristodontus
References
- ^ Jagt, John; Motchurova-Dekova, Neda; Ivanov, Plamen; Cappetta, Henri; Schulp, Anne (2006). "Latest Cretaceous mosasaurs and lamniform sharks from Labirinta cave, Vratsa District (northwest Bulgaria): A preliminary note". Annales g?ologiques de la Peninsule balkanique (67): 51–63. doi:10.2298/gabp0667051j. ISSN 0350-0608.
- Andreeva, Polina; Metodiev, Lubomir; Kiselinov, Hristo; Petrova, Silviya (2019-12-21). Campanian–Paleocene Carbonate Microfacies from the Sherbenski Dol Section (Eastern Fore-Balkan Mts, NE Bulgaria) – Preliminary Results (Report). "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences.
- "Bisserna cave". tecnet.cz. Retrieved 15 March 2024.
- ^ Nikolov, Vladimir; Dochev, Docho; Brusatte, Stephen L. (2024-01-01). "The ontogenetic status of a small hadrosauroid dinosaur from the uppermost Cretaceous of Bulgaria, and implications for the paleobiogeography and assembly of European island faunas". Cretaceous Research. 157 (In press). 105819. Bibcode:2024CrRes.15705819N. doi:10.1016/j.cretres.2023.105819. S2CID 266738171.
- "Hemipneustes striatoradiatus, Maastrichtian, Kaylaka Formation, Bulgaria". Faopal Fossils. Retrieved 15 March 2024.
See also
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