Ankarafantsika Formation
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| Ankarafantsika Formation | |
|---|---|
| Stratigraphic range: Cenomanian | |
| Type | Geological formation |
| Underlies | Basalt |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Coordinates | 16°24′S 46°54′E / 16.4°S 46.9°E |
| Approximate paleocoordinates | 37°48′S 36°36′E / 37.8°S 36.6°E |
| Region | Boeny, Mahajanga Province |
| Country | Madagascar |
| Extent | Mahajanga Basin |
| Type section | |
| Named for | Ankarafantsika National Park |
The Ankarafantsika Formation is a Late Cretaceous (Cenomanian) geologic formation of the Mahajanga Basin in the Boeny region of Madagascar, Africa. The fine-grained sandstones of the formation were deposited in a fluvial to lacustrine environment.[1][2]