GEOLOGY AND PALEONTOLOGY OP THE SCHOHARIE VALLEY 265 



This ledge is in the woods where it forms a cliff 30 feet high. The 

 dip is between 1J° and 2° s. 70° w. The rocks contain abundant 

 Hamilton fossils and belong near the middle part of the formation. 

 The following fauna was obtained : 



1 Spirifer mucronatus (Con.) BUI. c 



2 S. granulosus {Con.) H. tC- C. rr 



3 Athyris spirifer oicles (Eaton) Hall c 



4 Camarotoechia congregata (Con.) H. cC- (7. r 



5 Microdon (Cypricardella) tenuistriatiis Hall (?) it 



Imperfect and worn. 



6 Chonetesi mucronatus Hall c 



Specimens larger than the figures of this species. 



7 Chonetes deflectus Hall c 



8 Palaeoneilo tenuistriata Hall rr 



9 Macrodon liamiltoniae Hall rr 



10 Grammysia bisulcata (Con.) Hall r 



11 Tellinopsis subemarginata (Con.) Hall vv 



12 Pterinea flabellum (Con.) Hall rr 



13 C^^rtolites (Cyrtonella) pileolus Hall rr 



From the top of this ledge for 135 feet to the schoolhouse at the 

 road corners there are occasional outcrops of arenaceous shales, 

 and then for 305 feet along the road and brook the rocks are 

 mostly covered. By the side of the highway just above the house of 

 Mr George P. Bouck and about one mile above the river road is an 

 outcrop of from 8 to 10 feet of Hamilton shales (C^). Those at 

 the base are rather fine but the upper ones are coarser. The shales 

 are mainly argillaceous and contain numerous Hamilton fossils. 

 The list is: 



1 Spirifer mucronatus (Con.) Bill, r 



2 Cryptonella (Eunella) lincklaeni Hall c 



3 Athyris spiriferoides (Eaton) Hall rr 



4 Productella dumosa Hall (?) rr 



5 Camarotoechia prolifica (Hall) H. d C. rr 



6 Goniopbora hamiltonensis (Hall) Miller rr 



7 Nuculites oblongatus Con. rr 



8 Palaeoneilo constricta (Con.) Hall rr 



9 Cimitaria elongata (Con.) Hall (?) rr 



Imperfect. 

 10 Aotinopteria boydi (Con.) Hall c 



75 feet higher and 755 feet above the Schoharie river are very 

 thin, bluish, argillaceous shales (C^). In a laj^er of somewhat 

 coarser shales is an abundance of specimens of N y a s s a 

 arguta Hall; while a little higher are some thin layers of 

 concretionary sandstone. These shales are referred to the Hamil- 

 ton formation and the following fossils were collected. 



1 Cryptonella (Eunella) lincklaeni Hall c 



2 Athyris spiriferoides (Eaton) Hall a 



Abundant in a layer of thin, shaly roclf . 



3 Camarotoechia prolifica (Hall) H. & C. a 



Abundant in same layer as above, 



4 Spirifer mucronatus (Con.) Bill, rr 



