Dukamaje Formation | |
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Stratigraphic range: Maastrichtian [1] | |
Type | Geological formation |
Sub-units | Gypsiferous shale Member |
Lithology | |
Primary | Mudstone, shale |
Other | Siltstone, marl, gypsum |
Location | |
Coordinates | 15°24′N5°48′E / 15.4°N 5.8°E |
Approximate paleocoordinates | 5°06′N0°36′E / 5.1°N 0.6°E |
Region | Tahoua Sokoto |
Country | Niger Nigeria |
Extent | Iullemmeden Basin |
Type section | |
Named for | Dukamaje, Sokoto, Nigeria |
The Dukamaje Formation is a geological formation in Niger and Nigeria whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation. [1] A wealth of Mosasaur fossils have also been recovered from this formation, particularly from the area around Mt. Igdaman. [2]
Dinosaurs of the Dukamaje Formation | ||||
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Taxa | Presence | Description | Images | |
Genus:
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Mosasaurs of the Dukamaje Formation | |||
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Taxa | Presence | Description | Images |
Genus:
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| Mid-sized globidensine mosasaur. [3] Originally described as a plioplatecarpine. Durophagous. [2] | |
Genus:
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| Large mosasaur of uncertain affiliations. High number of foramina on the snout and small eyes indicate a murky-water hunter. [4] | |
Genus:
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| Represented here by four vertebrae, one from a juvenile. Fragmentary state makes identification difficult. [2] | |
Genus:
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| Mid-sized mosasaur. Represented here by four vertebrae. [2] | |
Genus:
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| Mid-sized plioplatecarpine mosasaur. Represented here by several vertebrae. [2] | |
Genus:
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| Mid-sized plioplatecarpine mosasaur. Represented here by a single fragmentary vertebrae. [2] | |
Genus:
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| Massive mosasaurine mosasaur. Represented here by a fragmentary tooth crown. The first example of Mosasaurus from Niger and Nigeria. [2] |
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