322 FLORIDA GEOLOGICAL SURVEY-SEVENTH ANNUAL REPORT. 
from the marl or limestone. The type occupies a position interme¬ 
diate between the heavier Parkwood soils and the sandy types such 
as the Portsmouth fine sand. The sandy surface material largely 
represents originally unconsolidated Coastal Plain deposits. Shells 
are often scattered throughout the soil and subsoil. 
In Pinellas County the Parkwood fine sandy loam was found to 
be of small extent, being confined to a few bodies of a total area of 
256 acres. One of the larger of these areas lies one-half mile north 
of Maximo Point. Another is situated ij4 miles south of Ulmer- 
ton. The other areas, which are of considerably smaller extent, occur 
as islands in a water and grass pond near Pinellas Park. It appears 
that the two larger areas of Parkwood fine sandy loam represent old 
inland tidewater basins. 
Cabbage palmetto, dense clumps of saw palmetto, saw grass, 
bulrushes, myrtle, and pine constitute the natural vegetation on this 
type. Figure 79 shows the character of vegetation on uncleared 
portions. 
None of the Parkwood fine sandy loam is at present under culti¬ 
vation, although attempts have been made in the past to utilize it. 
Owing to* its low-lying position and its somewhat impervious sub¬ 
soil, the type is badly in need of drainage. The soil, however, is 
naturally productive and, owing to its marl content, free from any 
trace of acidity. It has been found elsewhere in the State to be 
adapted to truck crops, especially cabbage, tomatoes, and Irish po¬ 
tatoes, and there is apparently no reason why it should not be used 
locally for the production of these crops. 
PARKWOOD SILTY CLAY LOAM. 
The typical soil of the Parkwood silty clay loam is an ashy-gray 
or drab silty clay loam, passing below into lighter drab to nearly 
white, heavy silty clay loam, containing a considerable quantity of 
white lime concretions, shells or fragments of shells, and partially 
decomposed material from limestone. The type shows some varia¬ 
tions from this typical description. In places the soil consists of 
black or dark-gray loam to silty clay loam, which may either grade 
below into drab or nearly white material like the typical subsoil, or 
into mottled drab and 3 r ellow or greenish-yellow plastic clay or 
sand)^ clay. Limestone and marl come within the 3-foot section in 
places, and sometimes outcrop at the surface. Where this limestone 
is exposed it becomes hard and flinty. 
