GEOLOGY AND MINERAL RESOURCES. 
E. H. SELLARDS. 
INTRODUCTION. 
The following paper contains a description of the natural re¬ 
sources of a part of Central Florida. For the area under considera¬ 
tion the report includes an account of (i) the geology, (2) the 
mineral resources, (3) the native vegetation and (4) the soils. The 
data on which the paper is based have been obtained to a consider¬ 
able extent in co-operation with the United States Geological Sur¬ 
vey and the United States Bureau of Soils. Co-operative work with 
the United States Geological Survey in the study of the geology of 
the State was carried on actively during 1907 and 1908 and to some 
extent since that time. Co-operation with the United States Bu¬ 
reau of Soils in this area was carried on during the winter of 1911 
and 1912, at which time the detailed soil survey of the area was 
made. At this time were secured also the data from which was 
made the map showing the distribution of the prevailing types of 
native vegetation. The data on which are based the plant lists and 
the description of the vegetation types were obtained for the Florida 
Survey during 1908-1909 and 1914-1915 by R. M. Harper. 
THE AREA TREATED. 
The section of the State treated in this report, the location of 
which is indicated on the accompanying sketch map, embraces parts 
of Marion, Levy, Citrus and Sumter Counties, including one-half 
degree of latitude (28° 45' to 29 0 15'), and one-half degree of 
longitude (82° to 82° 30'). The total area included is thus about 
1,002 square miles. The selection of this section of the State 'for 
the present report was determined by the fact that topographic maps 
of the area had previously been made by the United States Geo¬ 
logical Survey, thus facilitating field work. From these maps is 
taken the topography shown on the soil map, which accompanies 
this report. 
CHEMICAL ANALYSES OF THE SOILS. 
Chemical analyses of five samples of soil from the Ocala area 
are available and are included here for convenience of reference. 
121 
