Usili Formation
Geologic formation in Tanzania / From Wikipedia, the free encyclopedia
The Usili Formation is a Late Permian geologic formation in Tanzania. It preserves fossils of many terrestrial vertebrates from the Permian, including temnospondyls, pareiasaurs, therapsids and the archosauromorph Aenigmastropheus.[1][2]
Quick Facts Type, Unit of ...
Usili Formation | |
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Stratigraphic range: Lopingian ~259–252 Ma | |
Type | Geological formation |
Unit of | Songea Group |
Underlies | Manda Formation |
Overlies | Ruhuhu Formation |
Thickness | 260 m (850 ft) |
Lithology | |
Primary | Sandstone, conglomerate |
Other | Siltstone, mudstone |
Location | |
Coordinates | 10.3°S 35.1°E / -10.3; 35.1 |
Approximate paleocoordinates | 55.1°S 15.2°E / -55.1; 15.2 |
Region | Ruvuma Region |
Country | Tanzania |
Extent | Ruhuhu Basin |
Type section | |
Named for | Usili Mountain |
Named by | Stockley |
Year defined | 1932 |
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