REPORT OX THE PHOSPHATE FIELDS OF SOUTH CAROLINA. 
the phosphate properties are reached by the Atlantic Coast Line, the 
Southern, and the Charleston & Western Carolina Railroads, or 
spurs from these roads. 
CLASSES OF PHOSPHATE. 
The South Carolina phosphate deposits are usually classified under 
two heads, namely, the "River Rock" and the "Land Rock." . 
The River Rock was at first the most easily exploited, since it was 
cleaner and after being dredged from the river bed required but little 
RIVER RO< 
Fig. 1.— Approximate distribution of the South Carolina phosphates. 
subsequent treatment to make it a marketable product. It was some 
time before a satisfactory method of mining and cleaning Land Rock 
was devised. The two types of phosphate, however, are practically 
identical, the River Rock being merely the Land Rock washed down 
and concentrated in the river beds. 
The mining of River phosphate has now ceased and the rock shipped 
from South Carolina is all from the land and marsh deposits. This 
report, therefore, deals chiefly with the land deposits. 
