WATER SUPPEY OE EASTERN AND SOUTHERN ERORIDA. 287 
mainland the LostmatTs River Limestone lies near the surface. 
The deep wells at Key West reach the Vicksburg Limestone. 
ARTESIAN WELLS. 
No flowing artesian wells have been reported from Monroe 
County. It is probable, however, that flowing wells could be 
obtained in the northern part of the county and along the Gulf 
Coast. Several wells have been drilled on the keys, along the line 
of the Florida East Coast Railway. None of these, however, have 
been successful in obtaining either flowing or fresh water. 
LOCAL DETAILS. 
KEY VACA. 
Two deep wells have been drilled by the Florida East Coast 
Railway at Marathon, on Key Vaca. One of these wells reached 
a depth of 425 feet, the other 700 feet. The following is a com¬ 
bined record of these two wells by Samuel Sanford, who was in 
charge of the drilling. The log is republished from the Second 
Annual Report of this Survey, page 205: 
Feet. 
Reef rock. 0-105 
Hard to soft white limestone, with much white marl. 105-148 
Soft white limestone with shell casts. 148-150 
Medium hard white limestone, shell casts and shell frag¬ 
ments . 150-155 
Soft white limestone with quartz grains, proportion of 
quartz increasing with depth, shell fragments and 
casts . 155-176 
Medium fine quartz-sand containing numerous irregular 
nodules, with yellowish marly sand at 210 to 215 feet. 176-230 
Quartz sand in a varying proportion of limy mud, sand 
grains, colorless mud, yellowish to dark green; 
streaks and beds of friable sandstone containing shell 
casts; bed of oyster shells at 240 feet... 230-300 
Quartz sands or beds of soft, friable sandstone, contain- 
taining shell casts; streaks of dark green, limy clay, 
306-310 feet; beds of shells, few determinable fossils, 
probably Miocene, 378-390 . 300-400 
