All of the Lower Cretaceous-Upper Jurassic evaporite-bearing groups from northern Cuba to central FL are lumped into one genetic unit here called the Marquesas Supergroup. Includes the shallow-water lagoonal deposits of the Fort Pierce Formation, the Glades Group, the Ocean Reef Group, the Big Cypress Group, and the Naples Bay Group, which consist of dolomite, limestone, anhydrite, and gypsum. Thickness is 2365 m in the type well. Overlies unnamed Jurassic rocks and underlies the Pine Key Formation (new) and the Card Sound Dolomite.

Source: GNU records (USGS DDS-6; Reston GNULEX).