GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 273 



it should be referred. On the highway 50 feet higher or 825 feet 

 above West Fulton are bluish to greenish argillaceous shales (C 6 ) 

 and bluish gray flagging stone. No fossils were found and in 

 lithologic characters these rocks closely resemble those of the 

 Sherburne formation to which they are referred. Just south of 

 the turn on the first road turning south toward Eminence are thin 

 bedded, bluish gray, flagging stones (C 7 ) below which are smooth, 

 bluish, argillaceous shales weathering to an olive tint and con- 

 taining some concretionary nodules. These shales are about 45 

 feet above those of C 6 . 



On the highway 1-J miles east of Summit, in the eastern part 

 of Summit township, on the divide, is a layer of rather irregular 

 sandstone (C 8 ) which contains a few fossils. There are also 

 fossils in bluish, argillaceous shales occurring just above the 

 sandstone. On each side of the summit 20 feet below the fos- 

 siliferous sandstone are smooth, bluish shales which weather 

 olive and some grayish green flagging stone in which fossils were 

 not found. This fossiliferous zone is regarded as indicating the 

 appearance of the Ithaca fauna, succeeding the barren sandstones 

 and shales of the Sherburne formations and it is referred to the 

 Ithaca formation although the hasty search for fossils did not 

 yield specimens of Spirifer m e s a s t r i a 1 i s Hall. The 

 list of fossils is as follows : 



1 Spirifer mucronatus (Con.) Bill, c 



2 S. tullius Hall r 



3 Tropidoleptus carinatus (Con.) Hall r 



4 Mierodon (Cypricardella) bellistriatus Con. rr 



5 M. (C. ) gregarius Hall rr 



6 Sphenotus cuneatus (Con.) Hall rr 



7 Schizodus appressus (Con.) Hall rr 



On the south side of the road farther east near the Summit- 

 Fulton township line along the upper course of one of the 

 branches of the Westkill are coarse, grayish sandstone and 

 thinner blue shales (C 8 ). This ledge is 140 feet lower than the 

 fossiliferous zone of O 8 and is probably near the top of the Ham- 

 ilton. Fossils occur rather sparingly, the three following species 

 having been collected during a few minutes' search : 



1 Tropidoleptus carinatus (Con.) Hall v 



2 Spirifer sp. rr 



Fragments 



3 Nueulites oblougatns Con. rr 



Large specimen— 35 mm long 1 and 19 high 



On the western side of the divide going down into the second 

 valley, sands! one and coarse shales containing abundant Hamil- 

 ton fossils were found 120 feet below the zone C 8 . Between the 

 two fossiliferous zones are exposures of sandstones and smooth 



