![]() The Nashua Formation occurs within the Pliocene - Pleistocene in northern Florida. The distribution of the Caloosahatchee and Fort Thompson Formation are shown on previous geologic maps by Cooke (1945), Vernon and Puri (1964) and Brooks (1982). This is equivalent to the informal Okeechobee formation. In mapping the shelly sands and carbonates, a generalized grouping as Tertiary-Quaternary shell units (TQsu) was utilized. In an attempt to alleviate the inherent problems in the biostratigraphic recognition of lithostratigraphic units, Scott (1992) suggested grouping the latest Pliocene through late Pleistocene Caloosahatchee, Bermont and Fort Thompson Formations in to a single lithostratigraphic entity, the Okeechobee formation (informal). Often exposures are not extensive enough to facilitate the collection of representative faunal samples to properly discern the biostratigraphic identification of the formation. The identification of these units is problematic unless the significant molluscan species are recognized. This section consists of fossiliferous sands and carbonates. The "formations" previously recognized within the latest Tertiary-Quaternary section of southern Florida include the latest Pliocene - early Pleistocene Caloosahatchee Formation, the early Pleistocene Bermont formation (informal) and the late Pleistocene Fort Thompson Formation. These "formations" are biostratigraphic units. ![]() Scott and Wingard (1995) discussed the problems associated with biostratigraphy and lithostratigraphy of the Plio-Pleistocene in southern Florida. The shell beds have attracted much attention due to the abundance and preservation of the fossils but the biostratigraphy and lithostratigraphy of the units has not been well defined (Scott, 1992). The origin of these accumulations of fossil mollusks is imprecisely known (Allmon, 1992). Tertiary-Quaternary Fossiliferous Sediments of Southern Florida - Molluskbearing sediments of southern Florida contain some of the most abundant and diverse fossil faunas in the world. Shelly sediments of Plio-Pleistocene age (Pliocene/Pleistocene) at surface, covers 1 % of this area The highly porous and permeable Miami Limestone forms much of the Biscayne Aquifer of the surficial aquifer system. Fossils present include mollusks, bryozoans, and corals. Beds of quartz sand are also present as unindurated sediments and indurated limey sandstones. The bryozoan facies consists of white to orangish gray, poorly to well indurated, sandy, fossiliferous limestone (grainstone and packstone). The oolitic facies consists of white to orangish gray, poorly to moderately indurated, sandy, oolitic limestone (grainstone) with scattered concentrations of fossils. The Miami Limestone consists of two facies, an oolitic facies and a bryozoan facies (Hoffmeister et al. To the north, in Palm Beach County, the Miami Limestone grades laterally northward into the Anastasia Formation. From Big Pine Key to the mainland, the Miami Limestone is replaced by the Key Largo Limestone. The Miami Limestone occurs on the mainland and in the southern Florida Keys from Big Pine Key to the Marquesas Keys. It forms the Atlantic Coastal Ridge and extends beneath the Everglades where it is commonly covered by thin organic and freshwater sediments. The Miami Limestone (formerly the Miami Oolite), named by Sanford (1909), occurs at or near the surface in southeastern peninsular Florida from Palm Beach County to Dade and Monroe Counties. And then the quarry was turned into another Coral Gables landmark, magnificent Venetian Pool, a huge municipal swimming pool built in Venetian style architecture, with an island, restaurant, and tall palm trees.Miami Limestone (Pleistocene) at surface, covers 92 % of this area One of the most fascinating things about the City Hall is that the oolitic limestone (which we always called "Coral Rock") was quarried from a place in the city nearby. It's all because that style was all the rage in the 1920's-at the same time the early movie stars in Hollywood were building similar-styled mansions. (The City Hall is directly on LeJeune Road and Coral Way, so it's easy to find.) Most all the vintage houses in Coral Gables are also in the elegant Mediterranean style, with beautiful ornaments, fountains,and courtyards. Everything in Coral Gables today is Spanish in style, including the names of all the streets, etc., which feature fountains and plazas at all major intersections. The City of Coral Gables was one man's dream, and he developed it in the roaring twenties, which were really roaring in Miami. ![]() It's one of the architectural highlights of Coral Gables, the Miami suburb which is famous for its elegant homes, the fantastic Biltmore Hotel, and this City Hall. I grew up in Miami, and know this building well. ![]()
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