Isalo II, also known as the Makay Formation, is an informal

Triassic The Triassic ( ; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is t ...

geological unit in

Madagascar Madagascar, officially the Republic of Madagascar, is an island country that includes the island of Madagascar and numerous smaller peripheral islands. Lying off the southeastern coast of Africa, it is the world's List of islands by area, f ...

. It is described as "thick beds of mottled red or green clays associated with soft cross-bedded sandstones, light in colour and much finer-grained than the Isalo I sandstones." It is prominent in the

Makay Massif The Makay Massif is a mountain range in western Madagascar. Geography and geology The Makay Massif is situated in the district of Beroroha in the south and Malaimbandy in its north, in the south-east of Madagascar. It covers an area of approxim ...

.Brenon, P. (1972). The Geology of Madagascar. In: Battistini, R., Richard-Vindard, G. (eds) ''Biogeography and Ecology in Madagascar''. Monographiae Biologicae, vol 21. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-7159-3_2

Fossil content

Amphibians

Reptiles

Synapsids

References

{{reflist Geologic formations of Madagascar Triassic System of Africa Triassic Madagascar Ladinian Stage Carnian Stage Sandstone formations Mudstone formations Paleontology in Madagascar