| Mao Formation | |
|---|---|
| Stratigraphic range: Pliocene | |
| Type | Formation |
| Lithology | |
| Primary | Limestone |
| Other | Siltstone |
| Location | |
| Coordinates | 19°30′N71°12′W / 19.5°N 71.2°W |
| Approximate paleocoordinates | 19°30′N70°48′W / 19.5°N 70.8°W |
| Country | Dominican Republic |
The Mao Formation is a geologic formation in the northwestern Dominican Republic. The reefal limestone and siltstone formation preserves bivalve, gastropod, echinoid and coral fossils dating back to the Pliocene period. [1]