362 STEVESNON 



Albany to Sharon Springs has always been a favorite ground for 

 students. Prof James Hall made his first journey along its face 

 in 1832 and three generations of Gebhards have followed him 

 as industrious collectors along the Schoharie and its tributaries. 

 Recent studies have been made by Prof C. S. Prosser and Mr. 

 N. H. Darton, which have gone far toward removing uncertainty 

 respecting the relations of some of the beds. 



Schoharie Valley is a broad indentation of the Helderbergs 

 extending without material contraction for about five miles above 

 Schoharie village. At that distance, however, the Marcellus 

 has passed under the stream, and the hard beds of the Hamilton 

 form the walls of the valley. The writer's study was confined 

 to the immediate vicinity of Schoharie village, where, on both 

 sides of the valley, the section extends from the Hudson to the 

 Corniferous, while the Hamilton can be reached at barely a mile 

 away. The object of the study was to compare the section be- 

 low the Corniferous with that in south-central Pennsylvania. 

 Many details were obtained during the examination, which are 

 given here for the use of collectors who may visit the locality. 



THE HUDSON, MEDINA AND CLINTON 



The Hudson is represented indifferently at Schoharie, the ex- 

 posures on the west side near the bridge and near the edge of the 

 escarpment as well as the outcroppiiigs along the east side of the 

 valley north from the village being insignificant. But the beds 

 are better shown along the Delaware and Hudson railway from 

 Central Bridge to Esperance in this county where they are gray- 

 ish to drab shales and sandstones, making up the low rounded 

 hills northwestward from the escarpment. The thickness is 

 very great, for, according to Mr. Darton, a boring near Alta- 

 mont showed it 3,480 feet. 



The Medina is unrepresented, and the Oneida, so massive in 

 the Shawangunk, is wanting. The Hudson is succeeded by a 

 shale, which is well shown on the west side of the river at a lit- 

 tle way above the bridge, but very imperfectly on the valley 

 road and on the point of West mountain. This, regarded as the 



