Queguay Formation

Queguay Formation
Stratigraphic range: Late Cretaceous-Paleocene ~100.5–56.0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Overlies	Asencio Formation
Lithology
Primary	limestone
Location
Country	Uruguay
Type section
Named for	Queguay River, Uruguay

The Queguay Formation is a geologic formation in Uruguay.[1]

It consists of a lithological group composed of calcareous, calc-siliceous and siliceous rocks, of pedogenic or subterranean origin. It is formed by white and whitish limestones, massive, sandy and brecciated.

Vertebrate paleofauna

Several fossil gastropods have been found here:

• Bahiensis priscus Cabrera & Martínez, 2012[2]
• Biomphalaria manya Cabrera & Martínez, 2018[3]
• Biomphalaria reversa Cabrera, Martínez & Norbis, 2016[4]
• Bulimulus frenguellii Cabrera et al., 2021[5]
• Eoborus charruanus Frenguelli, 1930[6]
• Pupoides gnocco Cabrera & Martínez, 2017[7]

See also

• List of fossiliferous stratigraphic units in Uruguay
• Asencio Formation

References

1. Stratigraphic profile of the Queguay Formation
2. Cabrera, F.; Martínez, S. (2012). "The oldest Odontostomidae (Mollusca: Gastropoda): Bahiensis priscus n. sp. (Paleocene, Uruguay)". Paläontologische Zeitschrift. 86 (4): 451–456. doi:10.1007/s12542-012-0145-1. S2CID 128881268.
3. Fernanda Cabrera; Sergio Martínez (2018). "A new species of Biomphalaria Preston, 1910 (Gastropoda, Planorbidae) from the Upper Cretaceous of Uruguay". Revista Brasileira de Paleontologia. 21 (3): 272–275. doi:10.4072/rbp.2018.3.08.
4. Fernanda Cabrera; Sergio Martínez; Walter Norbis (2016). "Recognition of Biomphalaria species (Gastropoda: Planorbidae) using the spiral growth variability, with description of a new fossil species". The Nautilus. 130 (1): 5–12.
5. Cabrera, F.; Breure, A. S. H.; Norbis, W.; Martínez, S. (2021). "Description of a new Late Cretaceous species of Bulimulus Leach, 1814 (Orthalicoidea: Bulimulidae) using geometric morphometric analysis". Journal of Molluscan Studies. 87 (2): eyab006. doi:10.1093/mollus/eyab006.
6. Frenguelli, J. (1930). Apuntes de Geología Uruguaya. Instituto de Geología y Perforaciones.
7. Cabrera, Fernanda; Martínez Chiappara, Sergio Agustín (2017). "Pupoides gnocco". Journal of Conchology.