66 
FLORIDA STATE GEOLOGICAL SURVEY. 
*:■ Similar relations between the Ocala limestone and the phosphate 
were observed at the mine of the Union Phosphate Company, seven 
miles east of Newberry. The Alachua sink was visited by Mr. Clapp, 
who reported an exposure of about ten feet of soft, white limestone 
containing many flint nodules. From the collections made at this 
locality it is evident that the Ocala limestone forms part of the walls 
of the sink and it also appears probable that the overlying Hawthorne 
formation is present. On the island across the Indian River from Mel¬ 
bourne, Dr. Sellards reports the occurrence of the Ocala limestone 
at a depth of 221 feet. This determination was made from fragments 
of the rock obtained by Mr. Oliver Gibbs in drilling a well. The rock 
was found to contain nummulites, and although the specimens were 
not specifically determined, the occurrence of the genus appears to 
warrant its correlation with the Ocala limestone. This is a point of 
special interest because it shows the Ocala limestone to be nearer the 
surface in that part of the State than would naturally have been in¬ 
ferred from previous publications. 
The Ocala limestone is known to be well exposed at various points 
in the region where 'rock phosphate is being mined. Nummulites have 
been collected from various mines in the vicinity of Hernando, Citrus 
County. In a pit Sec. 10, T. 18, S. R. 19 E, the following section 
was observed: 
Yellow sand, with phosphatic gravel and brown and yellow clays; 
also phosphatic white and gray sand, sometimes greenish. 2-3 ft. 
Phosphatic bluish-gray clays, some hard sandstone with boulders of 
hard rock phosphate containing nummulites. 
The entire section probably represents altered and weathered phos¬ 
phatic Ocala limestone. 
Nummulites were also obtained by Eldridge from a stone quarry 
on the Burns place one and a half miles southwest of Owensboro, 
Citrus County, and on Mr. Clement’s mine No. 8, on the east side 
of Blue Springs, T. 16 S., R 19 E. 
Miliolite Limestone:—In 1887 Heilprin 1 noted at Wheeler’s, on 
the Homosassa River, the occurrence of a porous and cavernous lime¬ 
stone, which he called Miliolite limestone because of the presence of 
many foraminifera belonging to the Miliolidae. Dali 2 reports similar 
rock six miles southwest of Lake City, and thinks the “Miliolite ,, lime¬ 
stone belongs with the other foraminiferal limestones; but he does 
not express an opinion as to whether it belongs with the “Peninsular” 
or Ocala limestone. The Miliolite'’ limestone is here placed with 
1 Heilprin, Angelo. Explorations on the West Coast of Florida, Wag. Free 
Inst. Sci., Trans., vol. i, 1887, p. 57. 
2 Dali, Wm. H., Neocene of North America, U. S. Geol. Survey, Bull. 84, 
1592, pp. 104-105. 
