120 NEW YORK STATE MUSEUM 



This limestone again appears in a small brook, J of a mile south 

 of Wood's quarry. In the outcrops along Griss creek, 2} miles 

 south of Union Springs, the strata above the horizon of the Agon- 

 iatite limestone are shown, and a point of interest in this section 

 is the presence of a bed of 15 feet of blue and olive calcareous 

 shales, lying above the general mass of darker shales, which 

 carries certain trilobites (Homalonotus, Phacops), brachiopods, 

 gastropods, etc. pertaining to the normal Hamilton shale fauna. 

 These shales lie at about the proper horizon of the Stafford 

 limestone, though no trace of this rock has been seen so far 



east. 



Ontario county 



The westernmost observed exposure of the Agoniatite limestone 

 occurs on Flint creek, near the village of Phelps. The Lehigh 

 Valley railroad crosses this creek and the Sodus Bay railroad by 

 one bridge. On the south side of this bridge to the southernmost 

 outcrop of Onondaga limestone and 50 rods south of the next 

 highway bridge over the creek, there is a low ledge of the 

 Agoniatite limestone in the bed of the stream. It is here in the 

 usual condition and about a foot thick, underlain by dark impure 

 and bituminous limestones of the same character as those 

 observed at Union Springs but of considerably less thickness. 

 The rock here, contains A g o n i a t i t e s e x p a n s u s though 

 poorly preserved, lying close above the Onondaga. Though the 

 interval thence to the Onondaga limestone is not exposed it is 

 evidently not in excess of 10 feet. 



Genesee county 



The collections of the state museum contain a specimen of 

 Agoniatite® e x p a n s u s in a slab of the thin limestones 

 which lie near the top of the Onondaga beds at Lime Eock. This 

 specimen is an individual of large size though of poor pres- 

 ervation. 



Erie county 



The Lackawanna iron and steel co. has recently sunk shafts and 

 constructed a waterworks tunnel at Stony Point on Lake Erie, 



