WATER SUPPLY OP EASTERN AND SOUTHERN EEORIDA. 189 
A mixed sample contained material similar to above 
with addition of gray sandy clay . 
Buff colored sandy clay ... 
White granular fossiliferous limestone . 
This well probably reaches the Vicksburg group of limestones, 
as indicated by sample, from the depth of 180 to 225 feet. The 
material obtained between the depth of 168 and 180 feet may 
represent the Upper Oligocene, as it has certain lithological re¬ 
semblances to parts of the Alum Bluff formation. The conglom¬ 
erate material from 145 to 160 feet together with a part of the 
overlying clays probably represents the Jacksonville formation 
of the Miocene. 
HASTINGS. 
Hastings is in the western part of St. Johns County, and is 
located on Deep Creek, a tributary to the St. Johns River. The 
town site is inland about three miles from the river. The eleva¬ 
tion at Hastings, at the residence of T. H. Hastings, is, according 
to the U. S. Coast and Geodetic Survey, 8 feet above sea. 
A considerable number of artesian wells have been put down 
at and in the vicinity of Hastings. Record has been obtained of 
fifty-one wells within a radius of three miles of the town. 
Wells at Hastings are largely used for irrigating purposes. 
The average depth of the wells now in use is 148 to 272 feet, 
although some reach a greater depth. Most of the wells are 
4 to 6 inches in diameter. The length of casing used in the wells 
is variable, ranging from 65 to 170 feet. 
Aside from the superficial soil and sand the material penetrated 
at Hastings to a depth of about 170 feet consists largely of clays 
although some water-bearing sands are reported and a shell 
stratum at a depth of 60 to 62 feet is specially mentioned. 
At a depth of 170 to 180 feet a dark colored, very hard stratum 
occurs. This rock appears from the well records to be similar in 
character to the rock found at St. Augustine at a depth of 170 
to 180 feet. After passing through this stratum the wells pene¬ 
trate limestone consisting of alternating hard and soft strata, the 
160-168 
168-180 
180-225 
