112 FLORIDA GEOLOGICAL SURVEY SIXTH ANNUAL REPORT. 



which are not infrequent in this limestone, act as feeders to a well 

 and afford as a rule an inexhaustible supply of water. 



The inner, 12-inch, casing in this well was rested at 414 feet 

 or just within the Vicksburg limestone. A limited amount of 

 water was found in the well at the depth of 150 feet having a 

 head of 33 feet, 3 inches below the surface. This head was reduced 

 upon striking a second small supply of water at 155 feet, to 38 

 feet below the surface. This shallow water was shut off by the 

 casing, and no large supply such as would serve the purpose for 

 which the well was being drilled was obtained until the large 

 cavity was reached at the bottom of the well. The water in the 

 well after striking the cavity stood 37 feet from the surface and 

 was not appreciably lowered upon pumping 500 gallons per minute, 

 and machinery will be installed to pump the supply desired amount- 

 ing to about 2500 gallons per minute. While the samples obtained 

 from this well were sufficient to show the lithologic character of the 

 formations, the fossils were not sufficiently abundant to determine 

 satisfactorily the age of those formations lying above the Vicks- 

 burg limestone, and in order to obtain better representation of the 

 fossils, the company is now undertaking to preserve largely samples 

 from a second well that is to be drilled at this locality. In obtaining 

 these larger samples screens will be used through which the drillings 

 from the well will be passed and from which the samples will be 

 collected. 



Two wells drilled by the Florida East Coast Railway on Key 

 Vaca, one reaching a depth of 435 feet, the other 700 feet, care- 

 fully recorded by Mr. Samuel Sanford, who was in charge of the 

 drilling operations, have contributed largely to our knowledge of 

 the sub-structure of the Florida Keys. The data obtained from 

 these two wells has been supplemented by wells drilled at Key 

 West, the first of which reached a depth of 2000 feet, the second, a 

 depth of loio feet. At Palm Beach and at St. Augustine are deep 

 wells, records from which have been of much value in the study 

 of the geology and water supply of the State, the records of which 

 are included in the published reports of the Survey which are 

 available to those interested. 



The well records which have been given will serve to indicate 

 on the one hand the utility and value of exact data from deep 

 wells, and on the other hand will serve to emphasize the fact that 



