40 FLORIDA GEOLOGICAL SURVEY SIXTH ANNUAL REPORT. 



Blowers Lime and Phosphate Company, Ocala, Florida. ' 



- Crystal River Rock Company, Crystal River, Florida. 

 Florida Lime Company, Ocala, Florida. 

 Marion Lime Company, Ocala, Florida. 

 E. P. Maule, Fort Lauderdale, Florida. 

 Palm Beach County, West Palm Beach, Florida. 

 Standard Lime Company, Kendrick, Florida. 



BUILDING STONE. 



The building stone of the State consists chiefly of hmestones, 

 of which several varieties occur. 



Coquina: — The coquina rock of Anastiasia Island near St. 

 Augustine has been known as a building stone for more than three 

 hundred years. This coquina was in fact the first stone used for 

 building purposes in America, its use having begun with the settle- 

 ment of St. Augustine about 1565. Coquina consists of a mass of 

 shells of varying size or fragments of shells cemented together 

 ordinarily by calcium carbonate. A small admixture of sand is 

 in some instances included with the shells. When first exposed the 

 mass of shells is imperfectly cemented and the rock is readily cut 

 into blocks of the desired size. Upon exposure, however, the 

 moisture contained in the interstices of the rock evaporates and in 

 doing so deposits the calcium carbonate which it held in solution, 

 thus firmly cementing the shell mass into a firm rock. Thus indu- 

 rated the resisting qualities of the rock are good. The shells from 

 this formation have been extensively used with concrete in the con- 

 struction of modern buildings at St. Augustine. Aside from its 

 occurrence on Anastasia Island coquina is found at many other 

 points along both the east and the west side of the peninsula. 



Vicksburg Limestone : — The Vicksburg limestone has been used 

 to some extent for building purposes. This is true especially of 

 that phase of the Vicksburg known as the "chimney rock" de- 

 scribed in the preceding reports as the Marianna and the Peninsular 

 limestones. The chimney rock when first taken from the ground is 

 very soft and can be easily sawed into blocks. Upon exposure to 

 the air it hardens, due, as in the case of the coquina, to the evapn 

 oration of moisture 'from the interstices of the rock. The chimney 

 rock was early used both in Alabama and Florida for the construc- 

 tion of chimneys and to some extent for building purposes. 



Locally the Vicksburg and some of the other limestones in Flor- 



