174 FLORIDA GEOLOGICAL SURVEY-THIRD ANNUAL REPORT.
lying formations is very meager. In the city well at DeLand the first water was obtained at a depth of I i3 feet after passing through eight feet of clay and entering a twelve-foot shell stratum. The stratum of shell overlies a bed of rock reported to be 24 feet thick. The next rock encountered is at a depth of 237 to 247 feet. At Daytona the Vicksburg Limestone as shown by the comparatively shallow depths of the wells lies close to the surface and is presumably reached at from 125 to I5o feet.
AREA OF ARTESIAN FLOW IN VOLUSIA COUNTY.
The area of artesian flow in Volusia County is confined to a strip bordering the Atlantic Ocean on the east and a strip on the west bordering the St. Johns River. This area is indicated on the accompanying map. There are no doubt areas not mapped where flowing wells can be obtained. The area mapped, however, is based on definite information and on well records. In the northern portion of the county flowing wells are obtained as far west as Crescent Lake. This part of the county is flat and of low altitude.
LOCAL DETAILS
DAYTONA.
Daytona lies in the flowing artesian section in eastern Volusia County along the western bank of Halifax River. The city is supplied with water from four artesian wells, all of which are six inches in diameter. These wells were drilled in 19o9 but in order to obtain an increased flow were deepened in i9io and now range in depth from 165 to 260 feet. The 26o foot well on April 7, 1910, had a head of 9.3 feet above the surface or approximately 13.3 feet above sea. The wells now furnish an abundant supply of hard sulphuretted water.
In addition to the city wells above mentioned numerous private wells occur in and near Daytona. Of these it is possible to list only a few. Mr. Paul Petion owns a two-inch well about two and onehalf miles south of the city. The well was drilled by Mr. H. VanDorn in I9IO. It is 145 feet deep and is cased 85 feet. The first flowing water is reported to have been encountered at a depth of 85 feet after drilling through about one foot of hard rock.
Messrs. Bellough and Melton completed a two-inch well for Mr. Chas. Lee about two miles southwest of Daytona in April, 1910. This well is I30 feet deep and has a head of five feet above the surface. The first flow is reported from a depth of 88 feet just