70 
FLORIDA STATE GEOLOGICAL SURVEY. 
1885. Smith, Eugene A.: 
Phosphatic Rocks of Florida. Science, V, pp. 395-396. 
1885. 
In his earlier paper, 1884, Dr. Smith had assumed that 
the phosphatic rock at Hawthorne, which he had not seen, 
was of Vicksburg age. On the basis of information 
supplied to him by L. C. Johnson, and from the examina¬ 
tion of a hand specimen he concludes that the rock is of 
Miocene age. 
1885. Johnson, Lawrence C.: 
(Phosphatic Rocks of Florida.) Science, V, pp. 396, 1885 
This publication is in the form of a letter to Dr. E. A. 
Smith. In this letter Johnson reports phosphatic rock 
from various localities in Florida, among which are Pres¬ 
ton’s Sink, Nigger Sink and Live Oak. Evidence is 
presented to show that these phosphatic rocks are of later 
age than the Vicksburg. 
1886. Murray, John: 
Report on the Specimens of Bottom Deposits. Report on 
results of dredgings under the supervision of Alexander 
Agassiz in the Gulf of Mexico, in the Caribbean, and 
along the Atlantic Coast of the United States by the 
U. S. S. Blake. Mus. Comp. Zook, XII, No. 2, pp. 37- 
61, 1885;* abst. Am. Jour. Sci., (3) XXXI, pp. 221- 
225, 1886. 
Records the occurrence of concretions of phosphate of 
lime in the Strait of Florida. 
1887. Kost, J.: 
First Report of the Geological Survey of Florida, 31 pp., 
Tallahassee, 1887. Abst. Science, IX, 446-447, 1887. 
In this paper, pp. 21-24, Kost reports the examination 
of phosphatic limestone, sandstone and marl in Wakulla, 
Alachua, Marion, Hillsboro and Manatee Counties. Arr 
analysis is included of the phosphatic sandstone from near 
Sopchoppy in Wakulla County. 
