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] | |
Sakamena Group | Middle Sakamena Formation | Induan | [10] |
Lower Sakamena Formation | Capitanian-Wuchiapingian | [11] | |
Beaufort Group | Capitanian | [12] | |
Sakoa Group | Sakoa Formation | Sakmarian-Artinskian | [13] |
Karharbari Formation | Sakmarian-Artinskian | [14] | |
Talchir Formation | Asselian-Sakmarian | [15] |