FLORIDA GEOLOGICAL SURVEY


profiles of the water table. Heath and Clark conducted quantitative
studies to determine the effect of pumping in relation to salt-water
encroachment and to determine how much ground water could be
pumped from wells. They give a brief but adequate discussion on the
geology and cover such topics as use and quality of ground water.
 Chemical analyses of ground water in the two counties have been
published by the U.S. Geological Survey (Collins and Howard, 1928)
and by the Florida State Board of Conservation (Black and Brown,
1951). Black, Brown, and Pearce (1953) give a short description of the
intrusion of salt water into wells of the Newport Industries and of the
U.S. Navy near Pensacola. Chemical analysis of water from Pensacola
city wells was published in a report by Collins (1923, p. 33). Another
analysis of water from these wells was published by the U.S. Geological
Survey (Lohr and Love, 1954, p. 111).
 Stubbs (in Jacob and Cooper, 1940, p. 5-12) describes the upper 300
 feet of geologic deposits in the southern half of Escambia County. Heath
 and Clark (1951, p. 12-15) describe the same interval on Gulf Breeze
 Peninsula. Cooke (1945, p. 232-233) describes a short measured section
 exposed in the bluffs on the west side of Escambia Bay. He also noted
 the presence of several Pleistocene marine terraces in Escambia and
 Santa Rosa counties. MacNeil (1949) and Carlston (1950) likewise rec-
 ognize the existence of several marine terraces in the area. Calver's
 report on Florida kaolins and clays (1949, p. 24-28, 41-42) gives infor-
 mation on clays in Escambia and Santa Rosa counties and indicates which
 clays he believes have commercial value. The first detailed geologic study
 of Escambia and Santa Rosa counties was made by Marsh (1962) in
 connection with the comprehensive investigation of the water resources
 of the area. An interim report of that investigation (Musgrove, Barra-
 clough, and Marsh, 1961) summarizes the geology and water resources
 of the two counties. Barraclough and Marsh (1962) describe the geology
 and water resources of the southern half of Escambia, Santa Rosa,
 Okaloosa, and Walton counties.


 DESCRIPTION OF THE AREA

 Escambia and Santa Rosa counties are in the extreme northwest
 corner of Florida (fig. 1). Escambia County is the westernmost county
 in the State and is bordered by Alabama on the west. Both counties
 border on Alabama to the north and on the Gulf of Mexico to the south.
 Water courses serve as boundary lines on three sides of Escambia County