260 Forty- STXTH Report on the State Museum. 



similarit}^ of these shales to those of typical Hamilton, farther south, 

 appai-entty supports the last statement. Quite probably if there were 

 •opportunity for better study of the section, the upper shales would 

 prove to be transitional from the typical Marcellus to typical Hamilton. 



ISTearlj^ one mile southwest of West ^Vinfield, Herkimer Co., on the 

 north side of the highway from West Winfield to Bridgewater, Oneida 

 Co., is A497B. A small brook has exposed some shales in addition to 

 those on the hillside. Locally this station is known as the " coal 

 mine," from the fact that some years ago a considerable excavation 

 was made in the vain hope of finding coal, the search for which was 

 confine^ to a stratum of Marcellus shale at the foot of the hill 

 on the western bank of the brook, where it is massive when 

 taken out, but upon weathering splits up finely. The shale 

 is quite black, has a brownish-black streak and contains Styliola 

 fissurella^ Hall, in great abundance. Diligent search failed to 

 reveal any trace of coal either in the rock or its joints. The lowest 

 -exposures of 497 B', in the brook just above the highway, contain the 

 following species: 



Coleolus aeiculimi, Hall (?). 



Tjicnulicardmm fragile, Hall (?). 



Goidatites sp. 



The fossils are rare in these exposures and imperfectly pres* rved. 



A little higher in the "coal mine" 497 B'', are: 



IStyllola fissurella, Hall. This species is very abundant. Plant 

 sterns, common. 



Goniatites discoideos, Hall. 



Coleolus aclculum, Hall (?). 



An exposure of thin arenaceous shales near the summit of the hill, 

 497 B'", one hundred feet higher than B', contains a few fossils. The 

 most common is a small lAorhynclius, probably Z. liniitaris, Varmxem. 

 There was also found a Styliola (?) and, rarely, fragments of other 

 fossils. 



The lower shales of A 497 Bare somew^hat calcareous, thin layers 

 of calcite frequently occurring in the joints of the rock, while thote 

 near the top of the hill are arenaceous. The hill is evidently composed , 

 of Marcellus shales, although the upper part might more properly be 

 considered as transitional from the Marcellus to the Hamilton. This 

 is the most southern typical exposure of Marcellus shale noticed in the 

 Unadilla section. 



A 498 A is a section of Markham Mountain, a high hill on the eastern 

 «ide of the Unadilla river, in Plainfield, Otsego Co. The "mountain" is 



