BUILDING STONE. 579 
The line of outcrop of the Berea grit across the state from north to 
south is very near the dividing line between the formations of the Car- 
boniferous age on the east, where the building stone is almost exclu- 
sively sandstone, and the formations of Devonian and Silurian ages on 
the west, where it is almost exclusively limestone. 
The Waverly group, with its well-marked alternations of shales 
and sandstones, enters the state from Pennsylvania in its northeastern 
corner. The northern line of outcrop of the Berea grit in Ashtabula 
and Trumbull counties is for the most part deeply drift-covered, and in 
places it has been cut out by valleys of erosion. From Parkman, in 
the southeast corner of Geauga county, it can be traced in an almost 
continuous line of outcrop around to the Ohio river. In Parkman 
township, as far as exposed, it lies in thin, ripple-marked sheets. 
In Mesopotamia, Trumbull county, a quarry of some importance is 
worked by the Mesopotamia Freestone Company, one mile west of the 
town center. ‘The stone is used for buildings, flagging, bridges, ete., in 
the immediate neighborhood, and is of excellent quality. The nearest 
railroad station is 7 miles away. This company has just taken the con- 
tract to furnish the trimmings for the blocks now building at Burton, 
Geauga county. From this quarry the Berea grit passes northward, 
and its outcrop may be traced along the line between Geauga and Ash- 
tabula counties to the southeast corner of Lake county, where it turns 
to the soutnwest and follows along the line between Lake and Geauga 
counties into Cuyahoga county. 
The Berea grit is quarried at Windsor, in the southeast corner of 
Ashtabula county. This quarry marks the most northeasterly locality 
where the Berea grit has any special economic value asa building stone ; 
though even here the stone is much inferior to that to be obtained over 
quite an extent of country from Berea, Cuyahoga county, westward to 
Berlin Heights, Erie county. The pyrites and protoxide of iron con- 
tained in the stone at Windsor produce bad discoloration on exposure 
to the weather. As a source of material for heavy masonry this locality 
is invaluable, as Ashtabula county has no other stone well adapted for 
this purpose, and the Windsor quarry has furnished a large amount of 
stone for heavy bridge construction on the railroads and highways in 
this county. The quarry is located about six miles from the nearest sta- 
tion, and has the same disadvantage as the Mesopotamia quarry for 
shipping stone. 
