90 Report of the State Geologist. 



Corniferous and Seneca Limestones, The outcrop of this 

 rock is near the southern part of the alluvial plain of the 

 outlet, and consists chiefl}^ of a line of quarries, running 

 nearly straight S, E. by E. for seven miles. The rock forms 

 a level sheet near the surface for a considerable space in 

 two or three places. Northward it mostly descends in a slight 

 escarpment to the clay levels. The exposures represent the same 

 strata, or nearly so, in all the quarries. The easternmost, near 

 Canoga (but on higher ground), may be estimated as standing 

 470+ feet above tide ; the westernmost, the same, at the top 

 layer. This is consistent with the supposition of a general dip 

 S. W. by S., the rock being cut off level on the line of strike. 



Little can be inferred from the local dips in the quarries ; some 

 are to the north, others southerly, while small synclinals of four 

 feet with N-S axis occur in Frank's quarry, and a dip to N., S. 

 "W., and S. E., diverges from a common center in Thomas' 

 quarry. 



Contact with the Marcellus shale on the south is not observed ; 

 exposures approach each other within moderate distances. On the 

 north the only determining point is at McQuane's quarry, which 

 gives a probable width of two and one-half miles on the meridian, 

 or two miles southwest to the nearest Marcellus exposure. 



The layers of truly Corniferous rock, rough and ugly with 

 protruding masses of hornstone, which appear near the base of 

 this division in the well-known section along Flint creek, in 

 Phelps, Ontario . county, and which may be seen in bowlders 

 abundantly to the westward, are not visible at any section or 

 exposure in Seneca county. The quarries here represent a section 

 of 32 feet, apparently at or near the top, all showing the same 

 horizon ; they are practically free from flint in the lower two- 

 thirds of the section. A strip of one and one-half miles of ter- 

 ritory lies north of them, unrepresented, except by one exposure 

 at the Waterloo falls. 



The "Waterloo rock has been largely uncovered during the late 

 drought, in the bed of the stream. The upper two or three feet are 

 tolerably firm, in thick courses with some hornstone, and cavities 

 showing weathering out of fossils. The f\yei feet next below are 

 mostly a disintegrating mass of worthless shaly material ; with 



