Ialovachsk Formation Explained

Ialovachsk Formation
Type:	Geological formation
Age:	Santonian
Period:	Santonian
Prilithology:	Sandstone
Otherlithology:	Conglomerate
Region:	Jalal-Abad, Osh Sughd Fergana
Country:	Kyrgyzstan Tajikistan Uzbekistan
Coordinates:	40.2°N 71.7°W
Paleocoordinates:	34.9°N 65.8°W
Extent:	Fergana Valley & Range

The Ialovachsk or Yalovach Formation is a geologic formation in Kyrgyzstan, Tajikistan and Uzbekistan dating to the Santonian age of the Cretaceous period.^[1]

Fossil content

Fossil dinosaur eggs as well as pterosaur, dinosaur,^{[2] [3]} turtle^[4] and crocodyliforme^{[5] [6]} remains have been recovered from the formation.^[7]

The following fossils have been reported from the formation:

Amphibians

• Eopelobates sp.
• Eoscapherpeton superum

Mammals

• ?Kulbeckia kulbecke

Turtles

• Adocus foveatus
• Anatolemys maximus
• Lindholmemys gravis
• Shachemys baibolatica
• Trionyx kansaiensis
• T. riabinini

Dinosaurs

• cf. Alectrosaurus sp.
• Ankylosauridae indet.
• ?Ceratopsidae indet.
• Dromaeosauridae indet.
• Hadrosauridae indet.
• cf. Hypsilophodontidae indet.
• Kansaignathus sogdianus
• ?Neoceratopsia indet.
• Neosauropoda indet.
• Ornithomimidae indet.
• ?Oviraptoridae indet.
• Therizinosauridae indet.
• ?Theropoda indet.
• Troodontidae indet.
• Tyrannosauridae indet.

Other reptiles

• Azhdarchidae indet.
• ?Azhdarcho sp.
• Aves indet.
• Kansajsuchus extensus
• ?Pterosauria indet.
• Squamata indet.
• Tadzhikosuchus macrodentis

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with dinosaur trace fossils
    • Dinosaur eggs

References

Bibliography

Further reading

• I. G. Danilov, V. B. Sukhanov, and E. V. Syromyatnikova. 2011. New Asiatic materials on turtles of the family Adocidae with a review of the adocid record in Asia. Proceedings of the Zoological Institute, Russian Academy of Sciences 315(2):101-132
• N. N. Bakhurina and D. M. Unwin. 1995. a survey of pterosaurs from the Jurassic and Cretaceous of the former Soviet Union and Mongolia. Historical Biology 10:197-245
• L. A. Nessov. 1995. Dinozavri severnoi Yevrazii: Novye dannye o sostave kompleksov, ekologii i paleobiogeografii [Dinosaurs of northern Eurasia: new data about assemblages, ecology, and paleobiogeography]. Institute for Scientific Research on the Earth's Crust, St. Petersburg State University, St. Petersburg 1-156

Notes and References

1. Weishampel et al., 2004, pp.517-607
2. Alifanov. V. R.. Averianov. A. O.. January 2006. On the finding of ornithomimid dinosaurs (Saurischia, Ornithomimosauria) in the Upper Cretaceous beds of Tajikistan. Paleontological Journal. 40. 1. 103–108. 10.1134/s0031030106010126. 2006PalJ...40..103A . 140673522. 0031-0301.
3. Averianov. A. O.. Alifanov. V. R.. September 2012. New data on duck-billed dinosaurs (Ornithischia, Hadrosauridae) from the upper cretaceous of Tajikistan. Paleontological Journal. 46. 5. 512–519. 10.1134/s0031030112050036. 2012PalJ...46..512A . 140665908. 0031-0301.
4. Vitek. Natasha S.. Danilov. Igor G.. 2010-03-24. New material and a reassessment of soft-shelled turtles (Trionychidae) from the Late Cretaceous of Middle Asia and Kazakhstan. Journal of Vertebrate Paleontology. 30. 2. 383–393. 10.1080/02724631003617548. 2010JVPal..30..383V . 83498792. 0272-4634.
5. Kuzmin. Ivan T.. Skutschas. Pavel P.. Boitsova. Elizaveta A.. Sues. Hans-Dieter. 2018. Revision of the large crocodyliform Kansajsuchus (Neosuchia) from the Late Cretaceous of Central Asia. Zoological Journal of the Linnean Society. 185. 2. 335–387. 10.1093/zoolinnean/zly027.
6. Book: Storrs, Glenn W.. The Age of Dinosaurs in Russia and Mongolia. Efimov, Mikhail B.. Cambridge University Press. 2000. 978-0-521-55476-3. Benton, Michael J.. Cambridge. 402–419. Mesozoic crocodyliforms of north-central Eurasia. Shishkin, Mikhail A.. Unwin, David M.. Kurochkin, Evgenii N..
7. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Yalovach&group_formation_member=Yalovach Yalovach Formation