48 NEW YORK STATE MUSEUM 



half a mile south of the village, also in the side of -the dugway road 

 on the east side of the lake and in the Rye point and other ravines 

 farther north. 



It outcrops in the road h mile southwest of Wayne and along the 

 Bailey Gully stream and the highway a mile farther southwest. 

 The drift sheet is thin over the large area where this is the surface 

 formation, and small exposures are frequent along the sides of the 

 roads and in the numerous small gullies on the hillsides. 



The Hatch shale and flags are abundantly exposed along the foot 

 of Hatch hill at Naples, resting upon the Rhinestreet shale and 

 capped by the Grimes sandstones, also in the Genesee River gorge 

 from Smoky Hollow to the mouth of Wolf creek. They are softer 

 and more calcareous in the vicinity of Lake Erie where they may be 

 seen to good advantage in the ravine of Big Sister creek between 

 Angola and Pontiac, and along the lake shore near Silver creek. 

 On the Naples quadrangle the fossils occurring in the Hatch shale 

 are all representations of the Cashaqua shale or Naples fauna, but 

 much less in numbers. The following species may be found in the 

 lower beds on this quadrangle : 



Manticoceras pattersoni Hall Lunulicardium. ornatum Hall 



Probeloceras lutheri Clarke Honeoyea desmata Clarke 



Bactrites Buchiola retrostriata v. Buch. 

 Paleotrochus praecursor Clarke 



On the Wat kins quadrangle, adjoining on the east, a few repre- 

 sentatives of the Ithaca fauna are found in the Hatch shale and flags. 

 They are exceedingly rare here, though broken fragments of 

 brachiopods too small for identification appear in some of the more 

 calcareous sandstones. 



At 1250 A. T. in the Belknap gully a 6 inch sandstone contains: 



Spirifer mucronatus Conrad var. pos- Productella lachrymosa Hall 



terus Hall & Clarke Crinoid stems 



Schizophoria impressa Hall 



Grimes sandstone 



This formation is lithologically distinguished from the Hatch 

 shale and flags only by the much larger proportion of arenaceous 

 matter and consists of light blue -gray sandstones in layers from an 

 inch to 3 feet thick separated by thin layers of hard, blue shale. 

 The change in the proportion of sandstone and shale is very gradual 

 at the bottom and also at the top of the formation, consequently its 

 limits are very obscurely defined. This condition obtains through- 

 out the entire extension of this formation across the western part of 



