Kandreho Formation
Early Jurassic geological formation of Madagascar
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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.[1] Fossils of the marine teleosaurid thalattosuchian as well as bivalves and the ammonite Nejdia have been found in the formation.[2][3] The name Kandreho Formation was proposed by Geiger in 2004.[4]
| Kandreho Formation | |
|---|---|
| Stratigraphic range: Toarcian ~ | |
| Type | Geological formation |
| Lithology | |
| Primary | Marly limestone |
| Location | |
| Coordinates | 17.5°S 45.3°E |
| Approximate paleocoordinates | 22.3°S 24.0°E |
| Region | Mahajanga Province |
| Country | Madagascar |
| Extent | Mahajanga Basin |
| Type section | |
| Named for | Kandreho |
| Named by | Geiger |
| Year defined | 2004 |
Outcrop of the formation in Madagascar | |
Fossill content
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Crocodylomorphs
| Crocodylomorphs of the Kandreho Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Image |
| Teleosauridae Indet. | Indeterminate | Behazonaty | Toarcian | Upper jaw fragment | A teleosaurid thalattosuchian; originally known as "Steneosaurus". | |