on the upper road to Jamesville. The quarry, lying 
among the hills to the east of Onondaga Valley, is but a 
short distance from the lime-kiln, which is usually reck- 
oned as being midway between Jamesville and Syracuse. 
The sandstone occurs in a thin layer, not more than thirty 
inches in thickness. As this quarry is quite extensive, 
covering more than half a square mile, in some parts the 
sandstone comes to the surface, while in others this is 
overlaid by the Corniferous Limestone. As this sand- 
stone has no economic value, it is often gathered up as 
waste by the quarrymen and thrown into large heaps. 
Many of these heaps are excellent collecting grounds. 
Where the sandstone comes to the surface it is much dis- 
colored, and is often so disintegrated that it crumbles into 
sand. 
Another place where this sandstone occurs is near Dor- 
win Springs. This is five miles southwest of Syracuse, 
and is midway between that place and the village of South 
Onondaga, It is in the ridge of hills west of Onondaga 
Valley, and almost directly opposite the Britton Quarries. 
The exposure of Oriskany occurs about half way up the 
hill; it overlies the Lower Helderberg, which is quarried 
at the base of the hill, and is in turn itself overlaid by the 
rocks of the Corniferous Period. Its thickness on the slope 
of this hillis about eight feet, the perpendicular distance or 
real thickness being about six feet. The rock is very simi- 
lar to that at Britton’s Quarry, a rough sandstone largely 
colored by iron. About one foot from the top, and near 
the transition to the Corniferous, the rock is not so highly 
colored, having more the color and nature of limestone, 
although mainly arenaceous. The rock is full of fossils, 
especially the lower layers, though it is often difficult to 
obtain them from the rock zm sztu. Many large bowlders, 
some of them four or five feet in diameter, have become 
detached from the mass of the rock, and by demolishing 
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