532 NEW YORK STATE MUSEUM 



Sagenella ambigua, TFaZco^* 

 Cameroceras proteiforme, Hall sp. 

 Triartihrus becki, Green 

 Thej are hence undoubtedly of Utica age. 



Station 21. The Vly, Voorheesville 



The next southerly tributary of the Normans kill is the Vly. 

 This creek forms, as above noted, a fall below Voorheesville, 

 caused by a heavy bank of sandstone which suggests the Lor- 

 raine age of these beds. Following the course of the creek down- 

 ward, argillaceous shales, sandy shales and sandstone beds are 

 passed in manifold alternations. They show a general western 

 dip (20°), and in two places are thrown intoi a series of small 

 parallel folds, a few feet wide, striking n 15° e. These as well 

 as a fault, which runs in the same direction, are evidently the 

 faint westerly outrunners of the powerful Appalachian disturb- 

 ances of the Taconic mountains and of the Hudson river valley 

 region with which they run parallel. 



Farther down, about halfway between the sawmill and the 

 mouth of the creek, black shales begin to replace the sand- 

 »toneis and lighter colored shales. In one of the lower drab 

 beds of sandstone numerous large specimens of Oil i ma- 

 cog r a p t u s t y p i c a 1 i s were found, indicating the Utica 

 age of these lower sand beds (station 21). This sandstone effer- 

 vesces with HOI and is, hence, calcareious, like the Utica shale 

 of the Mohawk valley. In the dark gray sandy shales below 

 this sandstone, which, however, do not effervesce, were found : 



Olimacograptus typicalis. Hall 



Sagenella ambigua, Walcott 



Cameroceras proteiforme, Hall ep. 



It thus appears that along the Vly a section is exposed from 

 the Utica shale into the overlying Lorraine beds. This outcrop 

 of Utica shale is the most southern and western which could be 

 found in the region studied, as this shale toward the Helderberg 

 mountains dips under the Lorraine bed®, which in their turn 



