LOWER SILURIAN SYSTEM OF EASTERN MONTGOMERY CO. 437 



exposure of 5 feet of Birdseye limestone resting on an irregular 

 surface of arenaceous Calciferous sandrock and covered by a foot 

 or two of thin very lumpy black limestone, which is in turn suc- 

 ceeded by more compact semi-crystalline limestone. The sharp 

 break between the Birdseye limestone and Calciferous at this point 

 is mentioned by Darton, as also the dip, which is very noticeable.^ 

 At the foot of the next small pond is a fine exposure of nearly the 

 entire Trenton stage. 



45F Section at Smealee's paper mill 



F^ Thin bedded, dark colored, richly fossilifer- 

 ous limestone becoming shaly in the upper layers 

 and covered by a thin layer of soil. These layers 

 are somewhat crushed and folded. Base of this 

 division forms the floor of the quarry. Trenton. i8'=43' 4" 



F^ Medium to thin bedded dark blue fossilifer- 

 ous limestone abounding in brachiopoda. Trenton. io'=25' 4" 



F* Heavy bedded dark blue coarse to fine 

 grained limestone weathering light gray with rough 

 lumpy surface. Contains corals. Black river in 

 part. io'4"=i5'4'' 



F^ Three layers, two thin and one thick, dark 

 drab to bluish, fine grained to coarser at top, 

 smooth vertical cleavage, weathering ash-white. 

 Separated from no. 2 by a thin layer of shale. 

 Somewhat pyritiferous. Birdseye limestone. 2' 3"= 5' 



F2 Two layers of fine grained drab limestone 

 weathering very light bluish gray. Lower layer 

 with smooth weathered surface, upper rough. 

 Somewhat pyritiferous. 2' 9"= 2' 9'^ 



F^ Arenaceous steel-gray limestone, irregular angular surface of 

 brownish color, characteristically furrowed.^ Calciferous sandrock. 



This section may be compared with profit with the one almost 

 exactly two miles due south at Morphy's. The measurements are 

 strikingly alike and the dififerences in appearance are largely due to 

 difference in the degree of weathering. Layers corresponding to 



113th annual report N. Y. state geologist, p. 423. 



*The upper surface of this rock wherever freely exposed to the weather is almost 

 Invariably furrowed so that it has a decidedly checked appearance. 



