Barun Goyot Formation

The Barun Goyot Formation (West Goyot Formation) is a geological formation dating to the Late Cretaceous Period. It is located within and is widely represented in the Gobi Desert basin, in the Ömnögovi Province of Mongolia.
It was previously known as the "Lower Nemegt Beds" occurring beneath the Nemegt Formation and above the Djadokhta Formation. It has been suggested that the Djadokhta and Barun Goyot formations are lower and upper parts, respectively, of the same lithological unit and the boundary between the two doesn't exist. The stratotype of the Barun Goyot formation is the Khulsan locality, east of Nemegt. At Nemegt, only the uppermost barungoyotian beds are visible. The Red Beds of Khermeen Tsav are also considered part of the Barun Goyot formation. It is approximately 110m in thicknessGradzinski, R. Y. S. Z. A. R. D., & Jerzykiewicz, T. O. M. A. S. Z. (1974). Sedimentation of the Barun Goyot formation. Palaeontologica Polonica, 30, 111-146. and was laid down roughly 72-71 million years ago. Given the new date for the start of the Maastrichtian (72.1 MYA) a basal Maastrichtian age seems probable. The Barun Goyot Formation preserves an environment of sand dunes, created from wind-eroded rocks (aeolian dunes).
==Vertebrate paleofauna==
===Saurischians===
Genus	Species	Location	Material	Notes	Images
Ajancingenia	
A. yanshini	
* Hermin Tsav	 	
An oviraptorid	
Avimimus	
Indeterminate	
* Khulsan	 	
An avimimid similar to Avimimus portentosus from the Nemegt Formation.	
Ceratonykus	
C. oculatus	
* Hermin Tsav	 	
An alvarezsaurid	
Conchoraptor	
C. gracilis	
* Hermin Tsav	 	
An oviraptorid	
Gobipteryx	
G. minuta	 	
"Embryonic skulls and skeletons.""Table 11.1," in Weishampel, et al. (2004). Page 213.	
An enantiornithine	
Hollanda	
H. luceria	 	 	
An ornithuromorph	
Hulsanpes	
H. perlei	 	
"Partial foot.""Table 10.1," in Weishampel, et al. (2004). Page 199.	
A maniraptoran of uncertain classification	
?Mononykus	
Indeterminate	
* Khulsan	 	
An alvarezsaurid.	
Oviraptorinae indet.	
Indeterminate	
* Khulsan	 	
An oviraptorid.	
Parvicursor	
P. remotus	
* Khulsan	
"Partial postcranial skeleton.""Table 11.1," in Weishampel, et al. (2004). Page 211.	
An alvarezsaurid	
Sauropoda indet.	
Indeterminate	
* Khulsan	 	
A sauropod.	
Tarbosaurus?</small>	
T. bataar?</small>	 	 	
A tyrannosaurid, may actually be from the Nemegt Formation.</small>	
Velociraptorinae indet.	
Indeterminate	
* Hermin Tsav
* Khulsan	 	
A dromaeosaurid.	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
===Lizards===
Genus	Species	Location	Stratigraphic Position	Abundance	Notes	Images
Estesia	
Estesia mongoliensis	 	 	 	
An anguimorph.	
Ovoo	
Ovoo gurvel	 	 	 	
A Monitor lizard.	
Proplatynotia	
Proplatynotia longirostrata	 	 	 	 	
Gobiderma	
Gobiderma pulchrum	 	 	 	
A Monstersaur.	
===Mammals===
Genus	Species	Location	Stratigraphic Position	Abundance	Notes 	Images
Asiatherium	
Asiatherium reshetovi	 	 	 	A marsupial. 	
Asioryctes	
Asioryctes nemegetensis	 	 	 	
A placental. 	
Barunlestes	
Barunlestes butleri	 	 	 	
A placental. 	
Catopsbaatar	
Catopsbaatar catopsaloides	 	 	 	
A multituberculate.	
Chulsanbaatar	
Chulsanbaatar vulgaris	 	 	 	
A multituberculate.	
Deltatheridium	
Deltatheridium pretrituberculare	 	 	 	
A marsupial. 	
Nemegtbaatar	
Nemegtbaatar gobiensis	 	 	 	A multituberculate.	
===Ornithischians===
Genus	Species	Location	Material	Notes 	Images
Bagaceratops	
B. rozhdestvenskyi	
* Hermin Tsav
* Khulsan	
"[Five] complete skulls, [twenty] fragmentary skulls, postcranial skeletons, juvenile to adult.""Table 22.1," in Weishampel, et al. (2004). Page 479.	A ceratopsian.	
Breviceratops	
Breviceratops kozlowskii	 	 	
A ceratopsian.	
Lamaceratops	
Lamaceratops tereschenkoi	 	 	
A ceratopsian.	
Platyceratops	
Platyceratops tatarinovi	 	 	
A ceratopsian.	
Saichania	
S. chulsanensis	
* Hermin Tsav
* Khulsan	
".""Table 17.1," in Weishampel, et al. (2004). Page 364.	
An ankylosaur.	
Tarchia	
T. kielanae	
* Khulsan	 	
An ankylosaur.	
Tylocephale	
T. gilmorei	
* Khulsan	 	
A pachycephalosaur.	
ZaraapeltaArbour, V. M., Currie, P. J. and Badamgarav, D. (2014), "The ankylosaurid dinosaurs of the Upper Cretaceous Baruungoyot and Nemegt formations of Mongolia". Zoological Journal of the Linnean Society, 172: 631–652. doi: 10.1111/zoj.12185	
Z. nomadis	
* Hermiin Tsav	 	
An ankylosaur.	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
 	 	 	 	 	
===Eggs===
Oogenus	Oospecies	Location	Material	Notes
StyloolithusVarricchio, D.J. and D.E. Barta (2015). "Revisiting Sabath's "Larger Avian Eggs" from the Gobi Cretaceous" Acta Palaeontologica Polonica 60(1):11-25.	
S. sabathi	
* Khulsan	 	
Probably avian
FaveoloolithusK. Mikhailov, K. Sabath, and S. Kurzanov. 1994. Eggs and nests from the Cretaceous of Mongolia. In K. Carpenter, K. F. Hirsch, and J. R. Horner (eds.), Dinosaur Eggs and Babies, Cambridge University Press, Cambridge 88-115.	
F. ningxiaensis	
* Ikh-Shunkht	 	
Possibly sauropod eggs.
==See also==
* List of fossil sites (with link directory)
* List of dinosaur-bearing rock formations
==References==
Category:Geologic formations with imbedded sand dunes
Category:Upper Cretaceous Series of Asia
Category:Geography of Mongolia
Category:Geology of Mongolia
Category:Geologic formations of Asia