Javkhlant Formation Explained

Javkhlant Formation
Type:Geological formation
Age:Santonian-Campanian
~
Period:Santonian
Prilithology:Mudstone
Otherlithology:Sandstone, conglomerate
Namedby:Khand et al.
Year Ts:2000
Region:Dornogov
Coordinates:44.4°N 109.4°W
Paleocoordinates:44.6°N 98.8°W
Overlies:Bayan Shireh Formation
Thickness:380m (1,250feet)

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.

Paleobiota of the Javkhlant Formation

Dinosaurs

GenusSpeciesLocationStratigraphic PositionMaterialNotesImages
AlbinykusA. baatarKhugenetjavkhlant"Partial hindlimbs and pelvic girdle."[1] An alvarezsaurid.
Dendroolithidae indet.IndeterminateKhugenetjavkhlant"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.IndeterminateKhugenetjavkhlant"Embryonic remains enclosed within an isolated egg."[4] Bird eggs. Previously misidentified as neoceratopsian eggs.[5]
HayaH. grivaKhugenetjavkhlant, Zos Canyon"Skull with partial skeletons of multiple specimens."[6] [7] A thescelosaurid.
Ornithomimidae indet.IndeterminateKhugenetjavkhlantNot specified.[8] An ornithomimid.
YamaceratopsY. dorngobiensisKhugenetjavkhlant, Shine Us KhudukShine Us Khuduk red beds"Skull with partial skeletons, including juveniles."[9] [10] A neoceratopsian.
ZaraasuchusZ. shepardiZos Canyon"Skull and fragmentary skeleton."[11] A gobisuchid.
ZosuchusZ. davidsoniZos Canyon"Skull."[12] A shartegosuchoid.

See also

Notes and References

  1. 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 . 10.1080/02724634.2011.540053. 2011JVPal..31..144N . 85283009 .
  2. Book: 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. Maxwell. E.. Miller-Camp. J.. Anemone. R.. 73rd Annual Meeting of Society of Vertebrate Paleontology. Los Angeles. 155.
  3. 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. 10.1130/G46328.1. 2019Geo....47..843T . 198412503 .
  4. 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
  5. 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. Naturwissenschaften. 95. 6. 493−500. 2008NW.....95..493B. 10.1007/s00114-008-0347-2. 18347769. 6421080 .
  6. 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 . 10.1080/02724634.2011.557114 . 2011JVPal..31..626M . 86257644 .
  7. 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. 10.1206/0003-0090.445.1.1. 232059318. 0003-0090.
  8. Khand. Y.. Bagamgarav. D.. Barsbold. R.. 2000. Cretaceous system in Mongolia and its depositional environments. Developments in Palaeontology and Stratigraphy. 17. 49−79. 10.1016/S0920-5446(00)80024-2. 9780444502766 .
  9. 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). . 29 . 1 . 295–302. 10.1080/02724634.2009.10010384. 2009JVPal..29..295E .
  10. 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. 10.7717/peerj.13176. 8992648. 35402094 . free .
  11. Pol. D.. Norell. M. A.. 2004. A New Gobiosuchid Crocodyliform Taxon from the Cretaceous of Mongolia. American Museum Novitates. 3458. 1−31. 2246/2768. free.
  12. Pol. D.. Norell. M. A.. 2004. A New Crocodyliform from Zos Canyon, Mongolia. American Museum Novitates. 3445. 1−36. 2246/2810. free.

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