NORTHERN END OF THE HELDERBERG PLATEAU 63 



A little farther up the brook is a ledge of Oriskany, which in 

 this locality is a very dark gray to blackish quartzose sandstone. 

 On the Mt Sagerwana road, about 395 feet higher than the Beek- 

 man quarry, are ledges of the Onondaga limestone, which are 

 probably near the top of that formation. About 365 feet higher 

 are ledges of Hamilton sandstones, on the northern slope of Mt 

 Sagerwana, which contain some fossils. The formation continues 

 to the top of the mountain, some 500 feet higher than the lower 

 ledges of sandstone. By the side of the road, near its summit and 

 the house of Eugene Miner, are argillaceous shales containing 

 plenty of Hamilton fossils. 



On the northern side of the Foxkill, below Shutter Corners, is 

 a conspicuous ledge composed of the Tentaculite and Pentamerus 

 limestones. This ledge was studied on the Couch farm, about f 

 of a mile below Shutter Corners, where the following section was 

 made. 



Feet 



X A 1 From the road at the Couch house to the base 210=210 

 of the Tentaculite limestone the rocks are mostly 

 covered. A small gully in the cliff north of the 

 house shows the top of the waterlime and its con- 

 tact with the Tentaculite. 

 A 2 Tentaculite limestone thin bedded and dark blue, 40=250 

 with the characteristic lithology and fauna of 

 this formation. 

 A 3 Pentamerus limestone, forming the upper and most massive 

 part of the cliff. 



A good view may be had of this cliff from the upper part of 

 West mountain to the west of Schoharie village. 



SCHOHARIE SECTIONS 



To the west of Schoharie village and creek is a high hill known 

 as West mountain, which has been a famous geologic region for 

 more than half a century. A diagram of the mountain was pub- 

 lished by Darton, on which the terraces and position of the various 



