Queguay Formation

The Queguay Formation is a geologic formation in Uruguay.

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
 * Biomphalaria manya Cabrera & Martínez, 2018
 * Biomphalaria reversa Cabrera, Martínez & Norbis, 2016
 * Bulimulus frenguellii Cabrera et al., 2021
 * Eoborus charruanus Frenguelli, 1930
 * Pupoides gnocco Cabrera & Martínez, 2017