Earth:Asencio Formation

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Asencio Formation
Stratigraphic range: Campanian-Maastrichtian
~83.6–66.0 Ma
TypeGeological formation
Sub-unitsDel Palacio Member
UnderliesQueguay & Fray Bentos Formations
OverliesMercedes Formation
Lithology
PrimarySandstone
Location
Coordinates [ ⚑ ] : 33°00′S 57°12′W / 33.0°S 57.2°W / -33.0; -57.2
Paleocoordinates [ ⚑ ] 36°36′S 41°36′W / 36.6°S 41.6°W / -36.6; -41.6
RegionColonia, Río Negro, Soriano, Tacuarembó
CountryUruguay
ExtentParaná Basin
Type section
Named forCry of Asencio
Asencio Formation is located in Uruguay
Asencio Formation
Asencio Formation (Uruguay)

The Asencio Formation is a geological formation in the Paraná Basin of southwestern Uruguay whose strata date back to the Late Cretaceous (Campanian-Maastrichtian). Dinosaur remains are among the fossils that have been recovered from the formation.[1]

Vertebrate paleofauna

Fossil eggs

  • Sphaerovum erbeni[5]
  • Tacuarembovum oblongum[5]

Trace fossils

  • Teisseirei[6]
  • Elipsoideichnus meyeri[7]
  • Corimbatichnus[8]

See also

References

  1. ↑ Weishampel et al., 2004, pp. 600-604
  2. ↑ Neuquensaurus australis at Fossilworks.org
  3. ↑ Laplatasaurus araukanicus at Fossilworks.org
  4. ↑ Mones, Álvaro (1972). "Lista de los vertebrados fósiles de Uruguay, I. Chondrichthyes, Osteichthyes, Reptilia, Aves". Comunicaciones Paleontológicas del Museo de Historia Natural de Montevideo I (3): 30. https://www.mna.gub.uy/innovaportal/file/10917/1/cp3.pdf. Retrieved 20 December 2025. 
  5. ↑ 5.0 5.1 Mones, A. (1980) "Nuevos elementos de la paleoherpetofauna del Uruguay (Crocodilia y Dinosauria)." Actas II Congreso Argentino de Paleontologia y Bioestratigrafia y I Congreso Latinoamericano, Buenos Aires 1:265-277 (in Spanish)
  6. ↑ Novo Buess, Anaclara (2020). "Trabajo final de licenciatura en geología: "Mapa geológico de la región al sur de la ciudad de Mercedes y caracterización litológica de la formación Asencio"" (in es). https://www.colibri.udelar.edu.uy/jspui/bitstream/20.500.12008/29508/1/uy24-19957.pdf. 
  7. ↑ Verde, Mariano; Genise, Jorge F. (2014). "Elipsoideichnus meyeri Roselli 1987 revisited: A helicoidal fossil bee nest from the Paleogene of Uruguay". Spanish Journal of Palaeontology 29 (1): 25-32. https://turia.uv.es/index.php/sjpalaeontology/article/view/17485/15687. Retrieved 15 December 2025. 
  8. ↑ "Corimbatichnus fernandezi: A cluster of fossil bee cells from the late cretaceous‐early tertiary of Uruguay". Ichnos 7 (2): 115-125. doi:10.1080/10420940009380150. https://www.tandfonline.com/doi/abs/10.1080/10420940009380150. Retrieved 17 December 2025. 

Bibliography

Further reading

  • F. v. Huene. 1929. Terrestrische Oberkreide in Uruguay [The terrestrial Upper Cretaceous in Uruguay]. Centralblatt für Mineralogie, Geologie und Paläontologie Abteilung B 1929:107-112

Template:Stratigraphic formations of Uruguay