| Isalo II Formation | |
|---|---|
| Stratigraphic range: Ladinian-Carnian | |
| Type | Geological formation |
| Unit of | Isalo Group |
| Underlies | Isalo III Formation (unconformity) |
| Overlies | Isalo I Formation |
| Lithology | |
| Primary | Sandstone, mudstone |
| Location | |
| Coordinates | 20°18′S 45°24′E / 20.3°S 45.4°E |
| Approximate paleocoordinates | 23°06′S 24°42′E / 23.1°S 24.7°E |
| Region | Mahajanga & Toliara Provinces |
| Country |  Madagascar |
| Extent | Morondava Basin, Mahajanga Basin |
  Isalo II (Madagascar) | |
Isalo II, also known as the Makay Formation, is an informal Triassic geological unit in Madagascar.[1]
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.[2]
- ^ Nesbitt, S.J.; Flynn, J.J.; Pritchard, A.C.; Parrish, M.J.; Ranivoharimanana, L.; Wyss, A.R. (2015). "Postcranial osteology of Azendohsaurus madagaskarensis (?Middle to Upper Triassic, Isalo Group, Madagascar) and its systematic position among stem archosaur reptiles". Bulletin of the American Museum of Natural History. 398: 1–126. doi:10.1206/amnb-899-00-1-126.1. hdl:2246/6624. ISSN 0003-0090. S2CID 86289421.
- ^ 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