Kandreho Formation | |
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Stratigraphic range: Toarcian ~ | |
Type | Geological formation |
Lithology | |
Primary | Marly limestone |
Location | |
Coordinates | 17°30′S45°18′E / 17.5°S 45.3°E |
Approximate paleocoordinates | 22°18′S24°00′E / 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 |
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 crocodylian " Steneosaurus" 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]
Genus | Species | Location | Material | Notes | Images |
---|---|---|---|---|---|
" Steneosaurus " [1] |
| Behazonaty | Upper jaw fragment | A thalattosuchian mesoeucrocodylian. The genus Steneosaurus is a wastebasket taxon and the current referral of this specimen is unknown | ![]() |