Kandreho Formation
| Kandreho Formation Stratigraphic range: Toarcian ~180–176 Ma | |
|---|---|
| Type | Geological formation |
| Lithology | |
| Primary | Marly limestone |
| Location | |
| Coordinates | 17°30′S 45°18′E / 17.5°S 45.3°ECoordinates: 17°30′S 45°18′E / 17.5°S 45.3°E |
| Approximate paleocoordinates | 22°18′S 24°00′E / 22.3°S 24.0°E |
| Region | Mahajanga Province |
| Country |
 |
| Extent | Mahajanga Basin |
| Type section | |
| Named for | Kandreho |
| Named by | Geiger |
| Year defined | 2004 |
  Outcrop of the formation in Madagascar | |
The Kandreho Formation is an Early Jurassic (middle or late Toarcian) geological formation of the Mahajanga Basin of Madagascar. The marly limestones of the formation were deposited in a subtidal lagoonal environment. The formation overlies the Bouleiceras and Spiriferina beds of the early Toarcian and has been correlated to the Marrat Formation of Saudi Arabia. Fossils of the marine crocodylian Steneosaurus as well as bivalves and the ammonite Nejdia have been found in the formation.[1][2] The name Kandreho Formation was proposed by Geiger in 2004.[3]
Reconstruction of Steneosaurus
See also
References
- ↑ Behazonaty, SW of the basin of the Kelifely at Fossilworks.org
- ↑ Buffetaut et al., 1981, p.314
- ↑ Geiger, 2004, p.125
Bibliography
- Buffetaut, É.; G. Termier, and H. Termier. 1981. A teleosaurid (Crocodylia, Mesosuchia) from the Toarcian of Madagascar and its palaeobiogeographical significance. Paläontologische Zeitschrift 55. 313–319. Accessed 2018-08-30.
- Geiger, Markus. 2004. Sedimentary and stratal patterns in Jurassic successions of western Madagascar - Facies, stratigraphy, and architecture of Gondwana breakup and drift sequences (PhD thesis), 1–179. Universität Bremen. Accessed 2018-08-30.
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