278 FLORIDA GEOLOGICAL SURVEY-SEVENTH ANNUAL REPORT. 
ably in color with depth, though throughout^the 3-foot section the 
soil has a mottled color. The texture of the deep subsoil is variable 
also, ranging from a heavy fine sandy loam through a fine sandy 
clay to a stiff clay containing a little fine sand. In the largest area 
of this type, east of Sapp and west of the point at which New River 
enters the county, the lighter subsoil predominates, while in the 
area along the Raiford and Lawtey road the material is heavier at 
lower depths. 
The type occupies slightly elevated areas within the Portsmouth 
soils. Its drainage and oxidation represent an intermediate condition 
between the lower lying Portsmouth soils and the more elevated and 
better drained soils of the Norfolk series. The surface is flat to very 
slightly undulating. The type includes slight depressions occupied 
by cypress ponds and “bays.” 
The Coxville fine sandy loam supports a natural growth of long- 
leaf yellow pine, slash pine, and wiregrass. Small, stunted saw pal¬ 
mettos are occasionally seen, though they do not grow as profusely 
on this type as on some of the other soils. Most of the land has been 
cut over and the merchantable timber removed. The remaining trees 
are “boxed” for turpentine. Practically none of the type is under 
cultivation, though it is a better soil for general farm crops than the 
Portsmouth fine sand, and the yields should be equal to if not better 
than those secured on the Portsmouth fine sandy loam. With small 
expenditure the Coxville fine sandy loam could be drained by means 
of open ditches. Land of this type is valued at $8 to $10 an acre. 
BLACK SOILS. 
SEDIMENTARY MATERIAL-SANDS AND CLAYS. 
Portsmouth Series. 
The Portsmouth series includes dark-gray to black soils, resting 
on light-gray or mottled gray and yellow subsoils. The soils are 
high in organic matter, and the heavier members are always plastic, 
though carrying a noticeable quantity of sand. The soils of this 
series are developed in flat or slightly depressed, poorly drained 
areas. The series is most extensively developed in the flatwoods or 
low seaward portion of the Coastal Plain east of the Mississippi 
River, though scattered areas are found also in the higher parts of 
the Coastal Plain country. When drained the different types are 
