Fray Bentos Formation

The Fray Bentos Formation is a Deseadan geologic formation of the Paysandú Group in Uruguay and portions of Argentina, corresponding to the Paraná Basin. It is composed of calcareous sandstones and siltstones with a pinkish-orange coloration. It outcrops in southwestern Uruguay (Canelones and Soriano Departments), the central and southeastern part of the province of Corrientes and northeast Entre Ríos.

Fossil content
The following fossils have been reported from the formation:
 * Mammals
 * Argyrohyrax
 * Cephalomyidae
 * Eopachyrucos
 * Fiandraia
 * Proborhyaena
 * Prohegetotherium schiaffinoi
 * Protypotherium
 * Scarrittia
 * Uruguaytherium beaulieui


 * Birds
 * Devincenzia gallinali
 * Devincenzia pozzi