The Kaylaka Formation,[1] also known as the Kajlâka Formation, is a Late Cretaceous (Maastrichtian)[2] geologic formation located within Bisserna Cave, Shumen,[3] and Labirinta Cave, Vratsa Province, both in Bulgaria.[1]
| Kaylaka Formation | |
|---|---|
| Stratigraphic range: | |
| 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 |
| Region | Shumen Province and Vratsa Province |
| Country |  Bulgaria |
| Extent | Bisserna Cave and Labirinta Cave |
  Kaylaka Formation (Bulgaria) | |
History
editMost of the fossils found in the Kaylaka Formation were discovered in 1985, and were described in 2006;[1] the hadrosauroid specimen was not described until 2024.[4]
Paleofauna
edit- Anapachydiscus (Menuites) cf. terminus[1]
- Anomotodon sp.[1]
- Elasmosauridae? indet.[1]
- Hadrosauroidea indet.[4]
- Hemipneustes striatoradiatus[5][1]
- Hoploscaphites constrictus[1]
- Mosasauridae indet.[1]
- Mosasaurus cf. hoffmanni[1]
- Squalicorax pristodontus[1]
References
edit- ^ a b c d e f g h i j k 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.
- ^ a b 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
edit
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