Mao Formation

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.

Fossil content

 * Antillia coatesi
 * Diaphus aequalis
 * Isophyllia jacksoni, I. maoensis
 * Trachyphyllia mcneilli