Guabirotuba Formation
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The Guabirotuba Formation is a late Middle Eocene (Divisaderan in the SALMA classification) geologic formation of the Curitiba Basin in Paraná, Brazil. The formation crops out in and around the city of Curitiba and comprises mudstones and sandstones deposited in a fluvial floodplain environment.
Quick Facts Type, Underlies ...
Guabirotuba Formation | |
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Stratigraphic range: Late Mid Eocene (Divisaderan) ~42–38 Ma | |
Type | Geological formation |
Underlies | alluvium |
Overlies | Cambrian basement |
Thickness | 60–80 m (200–260 ft) |
Lithology | |
Primary | Mudstone, sandstone |
Other | Conglomerate |
Location | |
Coordinates | 25.5°S 49.3°W / -25.5; -49.3 |
Approximate paleocoordinates | 27.5°S 39.8°W / -27.5; -39.8 |
Region | Paraná |
Country | ![]() |
Extent | Curitiba Basin |
Type section | |
Named for | Guabirotuba, Curitiba |
Named by | Salamuni & Bigarella |
Year defined | 1962 |
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The 60 to 80 metres (200 to 260 ft) thick formation has provided several fossil mammals, and indeterminate side-neck turtle fossils, and indeterminate terror bird fossils. A newly described species of Cingulata; Proeocoleophorus carlinii was also found in the formation.