Ituzaingó Formation
The Ituzaingó Formation (Spanish: Formación Ituzaingó), in older literature also described as Entre Ríos or Entrerriana Formation, is an extensive geological formation of Late Miocene (Tortonian, or Huayquerian in the SALMA classification) age in the Paraná Basin of the Corrientes, Santa Fe and Entre Ríos Provinces in Mesopotamia, northeastern Argentina. The formation comprises mudstones, cross-bedded sandstones and conglomerates deposited in a fluvio-deltaic environment and is renowned for the preservation of a rich fossil assemblage, including many mammals, birds, reptiles, fish, bivalves, foraminifera, ichnofossils and flora.
| Ituzaingó Formation | |
|---|---|
| Stratigraphic range: Tortonian (Huayquerian) ~ | |
| Type | Geological formation |
| Sub-units | Conglomerado Osifero Member |
| Underlies | Puerto Alvear, Hernandarías, Timbúes & Yupoí Formations |
| Overlies | Paraná & Rosario Formations |
| Area | 120,000 km2 (46,000 sq mi) |
| Thickness | Up to 150 m (490 ft) Typically 10–20 m (33–66 ft) |
| Lithology | |
| Primary | Sandstone, mudstone |
| Other | Conglomerate |
| Location | |
| Location | Mesopotamia |
| Coordinates | 31.7°S 60.4°W |
| Approximate paleocoordinates | 31.8°S 58.3°W |
| Region | Corrientes, Santa Fe & Entre Ríos Provinces |
| Country | Argentina |
| Extent | Paraná Basin |
| Type section | |
| Named for | Ituzaingó |
| Named by | De Alba |
| Year defined | 1953 |
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