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. 18/==43".4" 
F® Medium to thin bedded dark blue fossilifer- 
ous limestone abounding in brachiopoda. Trenton. 10'—25A~ 
F* Heavy bedded dark blue coarse to fine 
grained limestone weathering light gray with rough 
lumpy surface. Contains corals. Black river in 
part. 10% 4° an 
F3 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. = a oe 
F* Two layers of fine grained drab limestone 
weathering very light bluish gray. Lower layer 
with smooth weathered surface, upper rough. 
Somewhat pyritiferous. a ye ato” 
F1 Arenaceous steel-gray limestone, irregular angular surface of 
brownish color, characteristically furrowed.2 Calciferous sandrock. 
This section may be compared with profit with the one almost 
exactly two miles due sowth at Morphy’s. The measurements are 
strikingly alike and the differences in appearance are largely due to 
difference in the degree of weathering. Layers corresponding to 
113th annual report N. Y. state geologist, p. 428. 
*The upper surface of this rock wherever freely exposed to the weather is almost 
invariably furrowed so that it has a decidedly checked appearance. 
