Tsagaantsav Formation
Stratigraphic range: Hauterivian-Barremian
TypeGeological formation
UnderliesZuunbayan Formation, Shinekhudag Formation
OverliesBasement
Lithology
PrimarySandstone, siltstone
Location
Coordinates44°54′N 110°24′E / 44.9°N 110.4°E / 44.9; 110.4
Approximate paleocoordinates46°42′N 112°18′E / 46.7°N 112.3°E / 46.7; 112.3
RegionKhovd, Uvs, Dornogovi & Övörkhangai Provinces
Country Mongolia
Type section
Named forTsagan-Tsab well
Tsagaantsav Formation is located in Mongolia
Tsagaantsav Formation
Tsagaantsav Formation
Tsagaantsav Formation
Tsagaantsav Formation
Tsagaantsav Formation (Mongolia)

The Tsagaantsav Formation, Tsagantsab Formation or Tsagan-Tsab Formation (Russian: Tsagaantsav Svita) is an Early Cretaceous (Hauterivian to Barremian) geologic formation in Mongolia.[1] Indeterminate sauropod and psittacosaurid remains have been recovered from the formation.[2] Remains of the pterosaur Noripterus, which were originally given their own genus, "Phobetor" have also been recovered from the formation.[3][4]

Graham et al. 2001 reported radiometric dates of 131 and 126 Ma from the formation.[5]

Fossil content

The following fossils were reported from the fluvial to lacustrine sandstones and siltstones of the formation:[1]

Insects
  • Khutelchalcis gobiensis
  • Eopelecinus fragilis
  • E. minutus
  • Praeichneumon townesi
  • Eobraconus inopinatus
  • Westratia femorata
  • W. pachygaster
  • W. pentadecamera
  • Langtonius cynaricaudatus
  • Eugenodiamesa makarchenkoi
  • Jurochlus adustus
  • Ellia khara
  • Protanyderus mesozoicus
  • Metatrichopteridium cladistorum
  • Plectrocentropus sulis
  • Eoclipsis mongolica
  • Coptoclavisca nigricollinus
  • Cretorabus orientalis
  • Mesaclopus mongolicus
  • Chinocimberis dispersus
  • Megametrioxenoides longus
  • Uroperla lacerata
  • Trianguliperla quassa
  • Aphaorus curtipes
  • Juleyrodes ?gilli
  • Izinabis kerzhneri
  • Siberiogenites medius
  • Torephemera longipes
  • Leptoneta calyptrata
  • Albisca tracheata
  • Epeoromimus infractus
  • Osmylogramma martinsoni[6]
  • Juraphididae indet.

See also

References

  1. 1 2 Tsagaantsav Formation in the Paleobiology Database
  2. ↑ Weishampel et al., 2004, pp.517-607
  3. ↑ Barrett et al., 2008
  4. ↑ Lü et al., 2009
  5. ↑ Tsagan-Tsab well in the Paleobiology Database
  6. ↑ Ponomarenko, 1992

Bibliography

  • Lü, J.; Y. Azuma; Z. Dong; R. Barsbold; Y. Kobayashi, and Y.-N. Lee. 2009. New material of dsungaripterid pterosaurs (Pterosauria: Pterodactyloidea) from western Mongolia and its palaeoecological implications. Geological Magazine 146. 690–700. .
  • Barrett, P.M.; R.J. Butler; N.P. Edwards, and A.R. Milner. 2008. Pterosaur distribution in time and space: an atlas in Flugsaurier: Pterosaur papers in honour of Peter Wellnhofer. Zitteliana B 28. 61–107. .
  • Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2
  • Ponomarenko, A.G. 1992. Novye setchatokrylye (Insecta: Neuroptera) iz mezozoya Mongolii. Novye Taksony Iskopaemykh Bespozvonochnykh Mongolii. Sovmestnaya Rossiisko-Mongol'skaya Paleontologicheskaya Ekspeditsiya 41. 101–111. .
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