Configuration of the Top of the Gray Limestone Aquifer in Dade County, USGS WRIR 90-4108, figure 14

Contours of the elevation of the top of the highly permeable gray limestone aquifer in the Tamiami Formation are shown in this map. The aquifer, as mapped, includes all intervals of the gray limestone that are at least 10 ft. thick and have an estimated hydraulic conductivity of at least 100ft/d. Also included are highly permeable beds of coarse, shelly sands (sometimes with sandstone) that are contiguous with limestone above or below or are likely to connect laterally with the limestone. The contour interval is 10 feet.