Earth:Sânpetru Formation

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Sânpetru Formation
Stratigraphic range: Early Maastrichtian
~70–68 Ma
↓
Szibisel patak Szentpéter mellett.jpg
Sibișel River near the Sânpetru Formation
TypeGeological formation
Sub-unitsLower & Upper Members
UnderliesMiocene deposits
OverliesStrei Formation, flysch
Thickness2,500 m (8,200 ft)
of which 860 m (2,820 ft) exposed
Lithology
PrimaryMudstone, sandstone
OtherConglomerate
Location
Coordinates [ ⚑ ] : 45°36′N 22°54′E / 45.6°N 22.9°E / 45.6; 22.9
Paleocoordinates [ ⚑ ] 30°30′N 22°06′E / 30.5°N 22.1°E / 30.5; 22.1
RegionHunedoara
Country Romania
ExtentCentral Hațeg Basin
Type section
Named forSânpetru
Sânpetru Formation is located in Romania
Sânpetru Formation
Sânpetru Formation (Romania)

The Sânpetru Formation is an early Maastrichtian geologic formation. Dinosaur remains are among the fossils that have been recovered from the formation.[1] It is located in Romania, near Sânpetru village, part of Sântămăria-Orlea commune. It forms a component of the Hațeg Island fauna.

Description

The Sânpetru Formation crops out in the central to southern Hațeg Basin along the Bărbat River and comprises sandstones and mudstones deposited in a wet floodplain environment characterized by braided fluvial channels. The formation is correlated with the Densuș-Ciula Formation of the northern section of the same basin, both dating to the Maastrichtian of the Late Cretaceous.[2]

Fossil content

Amphibians

Amphibians of the Sânpetru Formation
Genus Species Location Stratigraphic position Abundance Notes Images
Albanerpeton Indeterminate Albanerpetontid
Paralatonia P. transylvanica Frog

Turtles

Turtles of the Sânpetru Formation
Genus Species Location Stratigraphic position Abundance Notes Images
Kallokibotion K. bajazidi
Dortokidae Indeterminate
Emydidae Indeterminate

Squamates

Squamates of the Sânpetru Formation
Genus Species Location Stratigraphic position Abundance Notes Images
Barbatteius B. vremiri
Becklesius B. nopcsai
Bicuspidon B. hatzegiensis
Lacertilia Indeterminate 5 distinct taxa
Madtsoiidae Indeterminate Snake

Crocodyliformes

Crocodyliformes of the Sânpetru Formation
Genus Species Location Stratigraphic position Abundance Notes Images
Allodaposuchus[3] Indeterminate
Sabresuchus S. sympiestodon

Ornithischians

Ornithischians of the Sânpetru Formation
Genus Species Location Stratigraphic position Abundance Notes Images
Struthiosaurus[4] S. transylvanicus[4]
Telmatosaurus[4][5] T. transsylvanicus[4] "[Five to ten] fragmentary skulls, some with associated posctrania, mixed age classes."[6]
Zalmoxes[4] Z. robustus[4]
Z. shqiperorum[4]

Sauropods

Sauropods of the Sânpetru Formation
Genus Species Location Stratigraphic position Abundance Notes Images
Magyarosaurus[4] M. dacus[4]
Magyarosaurus sp - scapula.jpg
M. hungaricus[4]
M. transsylvanicus[4]

Theropods

Theropods of the Sânpetru Formation
Genus Species Location Stratigraphic position Material Notes Images
Gargantuavis Indeterminate Pelvis[7]
Bradycneme[4] B. draculae[4] "Distal tibiotarsus."[8]
Elopteryx[4][9] E. nopcsai[4] "Fragmentary femur."[8]
Elopteryx nopcsai bones.jpg
Euronychodon[10] Indeterminate[10]
Heptasteornis[4] H. andrewsi[4] "Distal tibiotarsus."[11]
Megalosaurus[4] M. hungaricus "Tooth."[12]

Pterosaurs

Pterosaurs reported from the Sânpetru Formation
Genus Species Location Stratigraphic position Material Notes Images
Eurazhdarcho E.langendorfensis
Eurazhdarcho restoration.jpg
Hatzegopteryx H.thambema
Hatzegopteryx humerus.jpg

Mammals

Mammals from the Sânpetru Formation
Genus Species Location Stratigraphic position Material Notes Images
Barbatodon B. transylvanicus Kogaionid
Kogaionon K. ungureanui Kogaionid

See also

  • List of dinosaur-bearing rock formations
  • Hațeg Island

References

  1. ↑ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
  2. ↑ Solomon & Codrea, 2015, p.26
  3. ↑ Solomon & Codrea, 2015, p.28
  4. ↑ 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 "29.3 Judetul Hunedoara, Romania; 1. Sânpetru Formation," in Weishampel, et al. (2004). Pages 592-593.
  5. ↑ Solomon & Codrea, 2015, p.30
  6. ↑ "Table 20.1," in Weishampel, et al. (2004). Page 439.
  7. ↑ Mayr et al., 2019
  8. ↑ 8.0 8.1 "Table 9.1," in Weishampel, et al. (2004). Page 185.
  9. ↑ Kessler et al., 2005
  10. ↑ 10.0 10.1 Listed as "cf. Euronychodon sp." in "29.3 Judetul Hunedoara, Romania; 1. Sânpetru Formation," in Weishampel, et al. (2004). Pages 592-593.
  11. ↑ "Table 9.1," in Weishampel, et al. (2004). Page 186.
  12. ↑ "Table 4.1," in Weishampel, et al. (2004). Page 78.

Bibliography

  • Mayr, Gerald; Vlad Codrea; Alexandru Solomon; Marian Bordeianu, and Thierry Smith. 2019. A well-preserved pelvis from the Maastrichtian of Romania suggests that the enigmatic Gargantuavis is neither an ornithurine bird nor an insular endemic. Cretaceous Research 106. 104271. doi:10.1016/j.cretres.2019.104271
  • Solomon, Alexandru, and Vlad Codrea. 2015. Some Maastrichtan vertebrates from fluvial channel fill deposits at Pui (Hațeg Basin). Muzeul Olteniei Craiova. Oltenia. Studii și comunicări. Științele Naturii 31. 26–36. ISSN 1454-6914
  • Kessler, E.; D. Grigorescu, and Z. Csiki. 2005. Elopteryx revisited - A new bird-like specimen from the Maastrichtian of the Hațeg Basin (Romania). Acta Palaeontologica Romaniae 5. 249–258.
  • Weishampel, David B.; Peter Dodson, and Halszka (eds.) Osmólska. 2004. The Dinosauria, 2nd edition, 1–880. University of California Press. ISBN:0-520-24209-2



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