588 GEOLOGY OF OHIO. 
examples cannot be found in which this stone is used for trimmings and 
ornamental work. 
Near Peninsula, in the northern part of Summit county, on the 
west bank of the Cuyahoga river, is a valuable outcrop of the Berea 
grit which has been very extensively quarried in the past, and shipped 
by canal to Cleveland and thence by lake to various lake ports, ,-rinci- 
pally to Buffalo, New York. The base of the Berea grit is here several 
feet above the canal. The stone is still shipped quite extensively by 
canal, and also by the Valley railroad. ‘The principal market at present 
is Akron. About 16 feet of the upper portion of the stratum are used 
for general building purposes; below this is a 7-foot course, used prin- 
ecipally for the manufacture of mill-stones, for hulling barley and other 
grains; below this, the bottom course, about 5 feet in thickness, is a 
rather hard material, used quite extensively for paving purposes. The 
cap-rock is here about 20 feet in thickness; below this the first 6-foot 
course of building stone contains more protoxide of iron than the Am- 
herst buff, and hasadarkercolor. The remaining portion of the stratum 
contains less iron, and much of it is almost white. 
The Peninsula stone has the reputation of being exceedingly strong, 
but it is harder and less homogeneous than that from the Amherst 
quarries. 
The Berea grit has two lines of outcrop in Summit county, one on 
each side of the Cuyahoga river. The one on the east side passes down. 
to Northampton township, where the stratum lies below the drainage 
level and contains a considerable amount of soluble compounds of iron, 
and has a very perceptible odor of petroleum, so that the material is not 
suitable for building purposes. ‘The stratum has not been quarried to 
the bottom in this locality, but only about 18 feet in depth. The sheets 
or layers, so far as quarried, vary in thickness from 6 inches to 6 feet. 
The blocks of stone are mostly sawed into slabs for sidewalk paving. 
Still farther south, on the west line of outcrop in the northern part of 
Portage township, a quarry has recently been opened for the purpose of 
supplying material for sidewalk paving, and some for steps, caps, sills, 
etc. This material is similar to that in the above quarry, except that so 
far as quarried in contains no perceptible traces of petroleum. 
The exposed strata of rock in Huron county show evidence of great 
disturbances and displacement. Sharp synclinal and anticlinal axes are 
