122 FLORIDA GEOLOGICAL SURVEY-NINTH ANNUAL REPORT. 
Several water holes representing old sinks are found along the line 
of this depression. A new sink was formed along the. bottom of 
the depression about one mile southeast of the lime sink in June, 
1907. A compact limestone showed in the bottom of this sink at a 
depth of about 25 feet from the surface. At the time this sink was 
formed the lake was low, a part of the water having been carried 
off through the opening which had been formed in the lime sink a 
month earlier. All the. water that could reach the new sink was car¬ 
ried off in the course of two or three days, leaving the lake dry 
except for occasional water holes. 
The surface soil in the basin is quite generally a gray sand dark¬ 
ened by the admixture of organic matter. In the lower parts of the 
lake, quite generally covered by water, more or less muck or peat is 
found, formed from the accumulation of aquatic vegetation. Sand 
lighter in color and lacking the organic matter occurs at a depth of 
from 1or 2 to 3 or 4 feet. Beneath this sand is the usual red 
sandy clay. 
The basin of this lake lies probably between 75 and 80 feet above 
sea level. The lake may have, had an outlet to the Ocklocknee 
River passing just east of Lake Jackson station, although at the 
present time the lake basin is about 25 feet below the lowest point 
in this divide. 
LAFAYETTE BASIN 
Lafayette Basin lies in the eastern part of Leon County, between 
Tallahassee and Chaires. The basin begins three and one-half miles 
east of Tallahassee, and extends to within one mile of Chaires, hav¬ 
ing a total length of about five and one-half miles and a width of 
one-half to one mile. An arm of the lake extends north from near 
the east end of the lake. The bottom of the basin is nearly level, 
with the exception of occasional slight depressions. The tributaries 
to the lake are flat-bottomed streams with relatively broad valleys 
and no well defined channel. The soil in the stream valleys is a 
sandy loam, and the streams are ordinarily dry, carrying water only 
during the rainy season. 
A drainage, sink in this basin is found near the west end of the 
lake, along the northern border. The sink when measured in Sep¬ 
tember, 1909, was found to have a total depth of 75 feet. The sink 
has been formed, as is usual in this type, of lake basin, near a promi¬ 
nent bluff. A second sink is formed beyond the lake border, thus 
