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Ohio Biological Survey 
as that previously described. In vertical range it corresponds approxi¬ 
mately to the first three zones of the flood plain forest to be described 
later. It is itself divided into distinct belts. 
Bed-rock banks .—These steep shores are of several kinds. In rare 
instances they are of bed-rock (Pt. Pleasant) in position, with large 
pieces broken off and scattered over the surface. Such banks have very 
little vegetation. A few annuals in the crevices of the rock, and scattered 
willow bushes are all that is found. 
Fig. 45, Beach-like shore of cobblestones on the Little Miami river near Gravel Pit. 
Rocky banks .—A later development of this type of river bank is 
sometimes found. Instead of ledges of rock, and large blocks lying 
around, the banks are covered with small angular fragments (dg. 46 ). 
The slope of this kind of shore averages about 12 degrees. There are 
more plants here than on the bed-rock banks, but the association is often 
open. For a few feet back from the water’s edge, the banks are almost 
bare. This zone corresponds approximately to the first zone of gently 
sloping shores. 
