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 Andrianavoay (originally classed as a species of Steneosaurus) as well as bivalves and the ammonite Nejdia have been found in the formation. The name Kandreho Formation was proposed by Geiger in 2004.

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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

Poker Chip Shale

Whiteaves Formation, British Columbia

Navajo Sandstone, Utah

Los Molles Formation, Argentina

Mawson Formation, Antarctica

Kota Formation, India

Cattamarra Coal Measures, Australia

References

Bibliography

Geologic formations of Madagascar

Jurassic System of Africa

Early Jurassic Africa

Jurassic Madagascar

Toarcian Stage

Limestone formations

Lagoonal deposits

Paleontology in Madagascar

Formations

Kandreho Formation