Kandreho Formation
Appearance
Kandreho Formation | |
---|---|
Stratigraphic range: Toarcian ~ | |
Type | Geological formation |
Lithology | |
Primary | Marly limestone |
Location | |
Coordinates | 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]
Gallery
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Reconstruction of Steneosaurus
-
Middle Jurassic (170 Ma)
See also
- List of fossiliferous stratigraphic units in Madagascar
- Geology of Madagascar
- Isalo III Formation
- Bemaraha Formation
- Toarcian turnover
- Toarcian formations
- Marne di Monte Serrone, Italy
- Calcare di Sogno, Italy
- Sachrang Formation, Austria
- Posidonia Shale, Lagerstätte in Germany
- Ciechocinek Formation, Germany and Poland
- Krempachy Marl Formation, Poland and Slovakia
- Lava Formation, Lithuania
- Azilal Group, North Africa
- Whitby Mudstone, England
- Fernie Formation, Alberta and British Columbia
- Whiteaves Formation, British Columbia
- Navajo Sandstone, Utah
- Los Molles Formation, Argentina
- Mawson Formation, Antarctica
- Kota Formation, India
- Cattamarra Coal Measures, Australia
References
- ^ Behazonaty, SW of the basin of the Kelifely at Fossilworks.org
- ^ Buffetaut et al., 1981, p.314
- ^ Geiger, 2004, p.125