11 genera and 23 species of corals.
small patch reefs (<100 m3) in Emperador Limestone.
Sr-age 17.6-22 Ma.
Astrocoenia, Stylophora, Pocillopora, Acropora, Astreopora, Pavona, Leptoseris, Porites, Goniopora, Goniastrea, Montastrea.