List of fossiliferous stratigraphic units in Madagascar
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Several fossiliferous stratigraphic units in Madagascar have provided fossils, most notably the Maastrichtian Maevarano Formation and the Jurassic Isalo III Formation. The oldest fossil-bearing formations date to ages before the break-up of Madagascar from Africa and India; the units of the Sakoa Group are found in both India and Madagascar, while the Beaufort Group is shared with southern Africa.
| Group | Formation | Period | Notes |
|---|---|---|---|
| Berivotra Formation | Maastrichtian | [1] | |
| Maevarano Formation | Maastrichtian | [2] | |
| Ankazomihaboka Formation | Coniacian | [3] | |
| Ambolafotsy Formation | Turonian | [4] | |
| Ankarafantsika Formation | Cenomanian | [5] | |
| Kandreho Formation | Middle or Late Toarcian | [6] | |
| Bemaraha Formation | Early Bajocian-Early Bathonian | [7] | |
| Isalo Group | Isalo III Formation | Bajocian-Bathonian | [8] |
| Isalo II Formation | Ladinian-Carnian | [9] | |
| Isalo I Formation | ~Middle–Late Triassic | [10] | |
| Sakamena Group | Upper Sakamena Formation | ~Middle Triassic | [11] |
| Middle Sakamena Formation | Induan | [12] | |
| Lower Sakamena Formation | Capitanian-Wuchiapingian | [13] | |
| Beaufort Group | Capitanian | [14] | |
| Sakoa Group | Sakoa Formation | Sakmarian-Artinskian | [15] |
| Karharbari Formation | Sakmarian-Artinskian | [16] | |
| Talchir Formation | Asselian-Sakmarian | [17] | |