| In Beceten Formation | |
|---|---|
| Stratigraphic range: Coniacian-Santonian | |
| Type | Geological formation |
| Underlies | Igdaman Group |
| Overlies | White Limestone Formation |
| Lithology | |
| Primary | Limestone, sandstone |
| Other | Shale |
| Location | |
| Coordinates | 15°06′N6°00′E / 15.1°N 6.0°E |
| Approximate paleocoordinates | 1°42′N0°54′E / 1.7°N 0.9°E |
| Region | Tahoua |
| Country | Niger |
| Extent | Iullemmeden Basin |
  In Beceten Formation (Niger) | |
The In Beceten Formation, also Beceten or Ibecten is a Coniacian to Santonian geologic formation in the Iullemmeden Basin of Niger. It has yielded a diverse fauna and some angiosperms. [1] Among others, it has yielded polypterifoms, [2] urodeles, [3] anurans, [4] [5] and turtles. [6] Dinosaur remains are among the other fossils that have been recovered from the formation, although none have yet been referred to a specific genus. [7] The lithology primarily consists of clays, fine limestones and sandy clays. [8] [9]