B. Geology
Darby
Plains
The Darby
Plains
are a significant glacial remnant that is primarily located between the Big and
Little Darby Creeks. Prior to
glaciation the Darby
Plains
was a moderately rolling upland that was cut by tributaries of the Teays
River. The glaciers buried these valleys
which are now up to 700 feet below the surface.
In most areas of
Ohio, glacial till has increased the surface relief but very little erosion has
occurred in the Darby Watershed. The
huge mass of ice, often referred to as Darby Ice, sat over the watershed and
slowly percolated through the glacial sediments as it melted, rather than being
removed through stream creation. In
turn this created one of the flattest areas in central
Ohio
instead of the more common dissected drainage topography in Ohio
(ODNR, 1992). The Darby
Plains
are not completely flat; they have a somewhat hummocky topography with small
rises and falls between two to seven feet. This
topography is likely a result of the flat topography before glaciation and the
length of time the ice remained over the area. (Brockman, Personal
Communication, 2003)
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