Tacuarembó Formation Explained

Tacuarembó Formation
Type:	Geological formation
Period:	Kimmeridgian
Age:	Kimmeridgian ~
Prilithology:	Sandstone
Otherlithology:	Siltstone, mudstone
Namedfor:	Tacuarembó
Region:	Tacuarembó Department
Coordinates:	-31.7°N -56°W
Paleocoordinates:	-40.2°N -15.7°W
Subunits:	Batoví Member
Overlies:	Buena Vista Formation
Extent:	Norte Basin

The Tacuarembó Formation is a Late Jurassic (Kimmeridgian) geologic formation of the eponymous department in northern Uruguay. The fluvial to lacustrine sandstones, siltstones and mudstones preserve ichnofossils, turtles, crocodylomorphs, fish and invertebrates (bivalves and gastropods).

Fossil content

The following fossils have been reported from the formation:^[1]

• Reptiles
  • Meridiosaurus vallisparadisi^[2]
  • Tacuarembemys kusterae^[3]
  • cf. Ceratosaurus sp.^{[4] [5]}
  • Coelurosauria indet.
  • Mesoeucrocodylia indet.
  • Testudines indet.
  • Tacuarembemys^[6]
  • Theropoda indet.
  • Torvosaurus sp. ("Torvosaurus ingens")^[7]
  • Tacuadactylus luciae^[8]
• Fish
  • Arganodus tiguidiensis^[9]
  • Asiatoceratodus tiguidiensis^[9]
  • Mawsonia gigas^[10]
  • Neoceratodus africanus^[11]
  • Priohybodus arambourgi^{[12] [13]}
  • Halecostomi indet.^[9]
  • Semionotiformes indet.^[14]
• Bivalves
  • Diplodon sp.^[9]
  • Tacuaremboia caorsii^[15]
• Gastropods
  • Viviparidae indet.^[9]
• Ichnofossils
  • Ornithopoda indet.
  • Sauropoda indet.
  • Theropoda indet.^[16]

See also

• List of fossiliferous stratigraphic units in Uruguay

References

Bibliography

Notes and References

1. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&formation=Tacuaremb%F3&group_formation_member=Tacuaremb%F3 Tacuarembó Formation
2. Fortier et al., 2011
3. Perea et al., 2014
4. Soto & Perea, 2008
5. Soto. Matías. Toriño. Pablo. Perea. Daniel. 2020-11-01. Ceratosaurus (Theropoda, Ceratosauria) teeth from the Tacuarembó Formation (Late Jurassic, Uruguay). Journal of South American Earth Sciences. en. 103. 102781. 10.1016/j.jsames.2020.102781. 2020JSAES.10302781S . 224842133 . 0895-9811.
6. Perea. Daniel. Soto. Matías . Veroslavsky. Gerardo . Martínez. Sergio . Ubilla. Martín. 2009. A Late Jurassic fossil assemblage in Gondwana: Biostratigraphy and correlations of the Tacuarembó Formation, Parana Basin, Uruguay. Journal of South American Earth Sciences. en . 28. 2 . 168–179 . 10.1016/j.jsames.2009.03.009.
7. Soto. Matías. Toriño. Pablo. Perea. Daniel. 2020-03-01. A large sized megalosaurid (Theropoda, Tetanurae) from the late Jurassic of Uruguay and Tanzania. Journal of South American Earth Sciences. en. 98. 102458. 10.1016/j.jsames.2019.102458. 2020JSAES..9802458S . 213672502 . 0895-9811.
8. Soto . M. . Montenegro . F. . Mesa . V. . Perea . D. . 2021 . A new ctenochasmatid (Pterosauria, Pterodactyloidea) from the late Jurassic of Uruguay . Journal of South American Earth Sciences . 111 . 103472 . 10.1016/j.jsames.2021.103472.
9. Soto & Perea, 2010
10. 2021-04-01. New findings of the coelacanth Mawsonia Woodward (Actinistia, Latimerioidei) from the Late Jurassic – Early Cretaceous of Uruguay: Novel anatomical and taxonomic considerations and an emended diagnosis for the genus. Journal of South American Earth Sciences. en. 107. 103054. 10.1016/j.jsames.2020.103054. 0895-9811. free. Toriño . Pablo . Soto . Matías . Perea . Daniel . Salgado De Carvalho . Marise Sardenberg .
11. Perea et al., 2003
12. Soto et al., 2012
13. Perea . Daniel . Ubilla . Martin . Rojas . Alejandra . Goso . Cesar A. . November 2001 . The West Gondwanan Occurrence Of The Hybodontid Shark Priohybodus, And The Late Jurassic-Early Cretaceous Age Of The Tacuarembo Formation, Uruguay . Palaeontology . en . 44 . 6 . 1227–1235 . 10.1111/1475-4983.00222 . 0031-0239. free .
14. Perea et al., 2003
15. Martinez . Sergio . Figueiras . Alfredo . da Silva . Jorge S. . 1993 . A new Unionoidea (Mollusca, Bivalvia) from the Tacuarembó Formation (Upper Triassic–Upper Jurassic), Uruguay . Journal of Paleontology . 67 . 6 . 962–965 . 10.1017/s0022336000025270 . 0022-3360.
16. Mesa & Perea, 2015