Javkhlant Formation
The Javkhlant Formation is a geological formation in Mongolia whose strata date back to the Late Cretaceous possibly Santonian to Campanian. Ceratopsian, ornithopod and theropod remains been found in the formation. A prominent fossilized therizinosauroid nesting site is also known from the formation.
| Javkhlant Formation | |
|---|---|
| Stratigraphic range: Santonian-Campanian ~ | |
 Khugenetjavkhlant locality | |
| Type | Geological formation |
| Overlies | Bayan Shireh Formation |
| Thickness | 380 m (1,250 ft) |
| Lithology | |
| Primary | Mudstone |
| Other | Sandstone, conglomerate |
| Location | |
| Coordinates | 44.4°N 109.4°E |
| Approximate paleocoordinates | 44.6°N 98.8°E |
| Region | Dornogov |
| Country |  Mongolia |
| Type section | |
| Named by | Khand et al. |
| Year defined | 2000 |
  Javkhlant Formation (Mongolia) | |
Paleobiota of the Javkhlant Formation
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
| Genus | Species | Location | Stratigraphic Position | Material | Notes | Images |
|---|---|---|---|---|---|---|
| Albinykus | A. baatar | Khugenetjavkhlant | "Partial hindlimbs and pelvic girdle."[1] | An alvarezsaurid. |  | |
| Dendroolithidae indet. | Indeterminate | Khugenetjavkhlant | "Large nesting site composed by more than 10 egg clutches in several nests."[2][3] | A nesting area laid by a colony of therizinosauroids. | ||
| Enantiornithes indet. | Indeterminate | Khugenetjavkhlant | "Embryonic remains enclosed within an isolated egg."[4] | Bird eggs. Previously misidentified as neoceratopsian eggs.[5] | ||
| Haya | H. griva | Khugenetjavkhlant | "Skull with partial skeletons of multiple specimens."[6][7] | A thescelosaurid. |  | |
| Yamaceratops | Y. dorngobiensis | Khugenetjavkhlant, Shine Us Khuduk | Shine Us Khuduk red beds | "Skull with partial skeletons, including juveniles."[8][9] | A neoceratopsian. |  |
References
- Nesbitt, Sterling J.; Clarke, Julia A.; Turner, Alan H.; Norell, Mark A. (2011). "A small alvarezsaurid from the eastern Gobi Desert offers insight into evolutionary patterns in the Alvarezsauroidea". Journal of Vertebrate Paleontology. 31 (1): 144–153. doi:10.1080/02724634.2011.540053.
- Kobayashi, Y.; Lee, Y.; Barsbold, R.; Zelenitsky, D.; Tanaka, K. (2013). "First record of a dinosaur nesting colony from Mongolia reveals nesting behavior of therizinosauroids". In Maxwell, E.; Miller-Camp, J.; Anemone, R. (eds.). 73rd Annual Meeting of Society of Vertebrate Paleontology. Los Angeles. p. 155.
- Tanaka, K.; Kobayashi, Y.; Zelenitsky, D. K.; Therrien, F.; Lee, Y.-N.; Barsbold, R.; Kubota, K.; Lee, H.-J.; Tsogtbaatar, C.; Idersaikhan, D. (2019). "Exceptional preservation of a Late Cretaceous dinosaur nesting site from Mongolia reveals colonial nesting behavior in a non-avian theropod". Geology. 47 (9): 843−847. doi:10.1130/G46328.1.
- Varricchio D.J., Balanoff A.M., Norell M.A., 2015, "Reidentification of Avian Embryonic Remains from the Cretaceous of Mongolia", PLoS ONE 10(6): e0128458
- Balanoff, A. M.; Norell, M. A.; Grellet-Tinner, G.; Lewin, M. R. (2008). "Digital preparation of a probable neoceratopsian preserved within an egg, with comments on microstructural anatomy of ornithischian eggshells" (PDF). Naturwissenschaften. 95 (6): 493−500. Bibcode:2008NW.....95..493B. doi:10.1007/s00114-008-0347-2. PMID 18347769.
- Makovicky, Peter J.; Brandon M. Kilbourne; Rudyard W. Sadleir; Mark A. Norell (2011). "A new basal ornithopod (Dinosauria, Ornithischia) from the Late Cretaceous of Mongolia". Journal of Vertebrate Paleontology. 31 (3): 626–640. doi:10.1080/02724634.2011.557114.
- Barta, Daniel E.; Norell, Mark A. (2021). "The Osteology of Haya griva (Dinosauria: Ornithischia) from the Late Cretaceous of Mongolia". Bulletin of the American Museum of Natural History. 445 (1): 1–112. doi:10.1206/0003-0090.445.1.1. ISSN 0003-0090. S2CID 232059318.
- Eberth, D.A.; Kobayashi, Y.; Lee, Y.N.; Mateus, O.; Therrien, F.; Zelenitsky, D.K.; Norrell, M.A. (2009). "Assignment of Yamaceratops dorngobiensis and associated redbeds at Shine Us Khudag (eastern Gobi, Dorngobi Province, Mongolia) to the redescribed Javkhlant Formation (Upper Cretaceous)". Journal of Vertebrate Paleontology. 29 (1): 295–302. doi:10.1080/02724634.2009.10010384.
- Son, M.; Lee, Y.-M.; Zorigt, B.; Kobayashi, Y.; Park, J.-Y.; Lee, S.; Kim, S.-H.; Lee, K. Y. (2022). "A new juvenile Yamaceratops (Dinosauria, Ceratopsia) from the Javkhlant Formation (Upper Cretaceous) of Mongolia". PeerJ. 10: e13176. doi:10.7717/peerj.13176. PMC 8992648. PMID 35402094.
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