TABLE OF CONTENTS PAGE ACKNOW LEDG EM ENTS ........................................................................................................................ ix ABSTRACT ............................................................................................................................................... x INTRO DUCTIO N ...................................................................................................................................... 1 STRUCTURAL G EO LOGY ..................................................................................................................... 5 Regional Structural Fram ework ................................................................................................... 5 Structural Fram ework of Brevard County ........................................................................................ 5 LITHOSTRATIG RAPHY ......................................................................................................................... 14 General Stratigraphy .......................................................................................................................... 14 Paleocene Cedar Keys Formation ............................................................................................... 14 Lower Eocene O ldsm ar Formation ............................................................................................. 14 M iddle Eocene Avon Park Form ation ........................................................................................ 16 Upper Eocene Ocala Lim estone ................................................................................................. 17 M iocene Hawthorn G roup ................................................................................................................ 18 Pliocene to Holocene Undifferentiated ........................................................................................ 18 DEPOSITIO NAL ENVIRO NM ENTS ................................................................................................. 18 O ldsm ar Form ation ............................................................................................................................. 19 Avon Park Form ation .......................................................................................................................... 20 GEOPHYSICAL CHARACTER OF THE LOWER FLORIDAN AQUIFER SYSTEM ......................... 21 DOLOMITIZATION IN THE LOWER FLORIDAN AQUIFER SYSTEM ....................... 23 HYDROG EO LOGY ................................................................................................................................ 25 General Hydrogeologic Sum m ary of the Floridan Aquifer System ............................................... 25 Hydrogeology of the M iddle Confining Unit of the Floridan Aquifer System ................................... 35 Hydrogeology of the Lower Floridan Aquifer System ................................................................... 35 Boulder Zone ................................................................................................................................. 38 Confining Layers ............................................................................................................................ 42 Fractures and Vertical Flow ..................................................................................................... 42 Hydraulic Head in W ells ................................................................................................................ 43 Aquifer Loading .............................................................................................................................. 46 Geothermal G radients .................................................................................................................... 49 GRO UND-W ATER CHEM ISTRY ANALYSIS .................................................................................... 57 In tro d u ctio n ........................................................................................................................................ 5 7 Primary W ells ..................................................................................................................................... 60 M e rritt Is la n d .................................................................................................................................. 6 0 South Beaches .............................................................................................................................. 64 D B L e e ....................................................................................................................................... 6 8 Secondary W ells ................................................................................................................................ 71 Harris Corporation .......................................................................................................................... 71 G ra n t S tre e t ................................................................................................................................... 7 3 Port Malabar .................................................................................................................................. 74 W est M elbourne ............................................................................................................................. 74 Hercules, Inc .................................................................................................................................. 75 DISCUSSIO N AND CO NCLUSIO NS ............................................................................................... 76 v