43 
to the south. There are no sharp bends, such as are to be seen on 
the east side of the valley. 
At the quarries one mile east of Onondaga Hill there are 
about three inches of black concretions separating the limestones. 
These are quite firmly consolidated by a calcareous cement. The 
underlying limestone contains great numbers of the Ostracoid 
crustacean, Leperditia alta. ‘The Onondaga contains the black 
nodular concretions in the lower part of the layer. 
At the Split Rock quarries there is only a trace of sand sep- 
arating the limestones. 
On the farm of Mr. Thomas Murphy, two miles northwest 
of Marcellus Falls, near the corner of the towns of Marcellus, 
Skaneateles, Camillus and Elbridge, there occurs one layer of 
coarse, variegated sandstone, three and one-half feet thick. ‘The 
colors are white to rusty red. The black concretions are not pres- 
ent except a very few at the base of the Corniferous. The Stro- 
matapora layer underlies. ‘The lower part of the sandstone is 
very fossiliferous. 
Two miles west of this exposure the rock again occurs on 
the farm of J. A. Foster, one mile south of Halfway station. The 
rock is exposed to the west of the highway and the lowest layer 
extends across the roadway. The rock is mostly concealed by 
drift and an accurate measurement is impossible. A trigono- 
metrical estimate makes the thickness twenty-six feet. The rock 
is similar to that on the Murphy farm both in texture and color, 
except that one thin layer about eighteen feet from the base is 
much whiter than any other found in the county. There are no 
concretions except a few in the highest layer. A few small frag- 
ments of included rock are to be seen. The fossils are less num- 
erous than at Murphy’s. 
According to Professor Schneider’s “* Notes on the Geology 
of Onondaga County,” the sandstone occurs in the bluffs east of 
the Glenside Mills, Skaneateles village and is nearly twenty feet 
thick. 
The Oriskany sandstone forms part of the glacial drift south 
of the town line of Elbridge. Many large boulders occur, just 
south of the outcrop, which the farmers have appropriated for 
