474 



NEW YORK STATE MUSEUM 



Amsterdam section 



On the northern bank of the Mohawk, not far above the river 

 bridge at Amsterdam the Birdseye and Black river subformations 

 of the Trenton are shown. 



45 Z^ Arenaceous limestone to the river level. 

 Calciferous formation. 



7? Drab compact limestone of the Birdseye. Not 

 typical in appearance. 



Z^ Very dark gray, somewhat lumpy limestone. 

 Black river. 



Z^ At top of the ledge about i foot of lighter 

 gray limestone containing Trenton fossils. Trenton 

 limestone. 



Pattersonville section 



Feet 



5= 5 

 &=I3 



8=21 

 1=22 



Since the description of the Pattersonville section appeared,^ the 

 Moore quarry has been worked extensively for the Erie canal, so 

 that the character of the Trenton limestone is shown to better advan- 

 tage than formerly. The following section from river level to the 

 top of the Moore quarry is given for comparison with the former 

 section. 



2D^ Covered from river level to ledges in the 

 woods SSW of Pattersonville. 



D^ Partly covered. Some ledges of rough cal- 

 careous sandstone in which is some flint. Calciferous 

 sandrock. 



D^ Drab, somewhat lumpy limestone in which are 

 large masses of Columnaria alveolata 

 Goldf. This is best shown in the little run below the 

 Moore quarry where^ in the small fall, are 7 feet, 6 

 inches. 



D* Massive rather light gray limestone forming 

 the lower part of the Moore quarry. Trenton lime- 

 stone. 



D^ Shaly quite fossiliferous dark blue Trenton 

 limestone. 



Feet 



140=140 



70=210 



7i=2i7i 



10^5=228^ 



6=234-J 



*13th annual report N. Y. state geologist, p. 656-57, section 2B. 



