DRAINAGE OF SOUTHERN INDIANA 173 
Fourteen Mile Creek rises in the southwestern part of Jeffer- 
son county, flows slightly west of south with the dip of the strata 
and enters the Ohio three miles southeast of Charleston. In its 
lower portion Fourteen Mile Creek cuts down into the Hudson 
river strata. Other shorter streams have their sources in the 
area covered by the Niagara limestones, or the Devonian strata, 
and flow more or less directly into the Ohio across Hudson river 
strata. While the general courses of these streams are such as 
might be expected from the structure of the underlying strata 
(with the exception perhaps of Muddy Fork of Silver Creek, 
which rises at P, Plate VI, and flows eastward across the dip of 
the Knobstone strata), the influence of that structure on them is 
by no means so clearly marked as it is on the streams in the 
district next to be considered. 
The northern district—It is in the northern district (that por- 
tion of the central area lying north of the southernmost cross 
section, Plate VI), drained by the East White and Muscatatuck 
rivers, that the effect of the structure upon the drainage is most 
clearly seen. 
The streams that drain the northern district rise for the most 
part near the watershed which separates this from the eastern 
drainage area, within a few miles of the main drainage lines 
of the eastern area, and flow westward down the gentle slope 
that owes its inclination to the dip of the underlying beds. In 
their upper portions most of the streams have gradients greater 
than the dip of the underlying beds and have consequently cut 
down from newer into older strata. In their lower courses the 
gradients are less than the inclination of the strata, and the 
streams pass across successively newer beds." The streams that 
rise on the western rim of the northern district and flow eastward 
are short and have steep gradients. 
Except for the course of East White River below Seymour 
*This feature is well shown by the tributaries of Stucker’s Fork, in townships 3 
north, 8 andgeast. These streamsrise in the Devonian shale area, flow westward with 
the dip, but cut down through the shale, exposing the underlying limestones for a 
distance of about six miles, and then, the fall becoming less than the dip of the under- 
lying beds, again pass out into the shale area. 
