REPORT OF INVESTIGATIONS NO. 75 hydraulically separate water-bearing zones (Meyer, 1971). The upper 600-foot section is composed of limestone interbedded with calcareous clay and the lower 900-foot section (the principal water-bearing zone) is composed chiefly of highly permeable dolomitic limestone. The head and the salinity of the ground water increase with depth in the Floridan aquifer. Locally the head of the brackish water in the principal artesian water-bearing zone stands 41 feet above msl. CASINGS= MINOR ARTESIAN ZONES MAJOR ARTESIAN ZONES CONFINING BEDS I I I BOULDER ZONE 20 10 II EXPLANATION: . CEMENT OPEN HOLE 0 NCHES I I I0 20 ADAPTED FROM GARCIA- BENGOCHEA 1970, PLATE 4-2 Figure 2 Sketch showing well construction. w I zcI, O CO LL a I000 2000 3000 °1