482 NEW YORK STATE MUSEUM 
Feet 
chert. The beds are thinner than those of the over-: 
lying limestone. Apparently the equivalent of zones . 
B‘ and B® on the north bank. 5) 
A? Massive light to dark gray crystalline limestone 
varying in thickness from 11 feet, 6 inches to 12 feet. 
It contains numerous crinoid segments and is in the 
Trenton limestone. Represents the “ marble’ beds 
or B® of the north bank. 12==18 
A‘* Thin bedded, dark blue limestones containing 
Trenton brachiopods. Under the highway bridge 
and equivalent to zone B’ of the north side. The 
dip as measured on this bank varies from 4° to 54°S 3 
8o°W. Another dip of 2°S 10°E was measured. 1836 
On the south bank of the river below the paper mill are quar- 
ries, the lower ones being worked for “‘ marble” and the upper for 
massive limestone. The section of the bank at this locality is as 
follows: 
GAC “Tielé . bedded, dante sultee gavie meueannes eee 
same zone as B® on the north side and with the 
same thickness. 328=> 313 
C? The “marble” beds of the old quarries. 129,16 1, 
C? Thin bedded limestone with Trenton fossils. 14=30,'5 
C* Thicker bedded, more crystalline layers in 
which are the upper quarries. 13 s=44 
C° Thin bedded limestones to the top of the cliff.  19$==634 
Correction. In the paper on the Sections and thickness of the 
Lower Silurian formations on West Canada creek and in the Mohawk 
valley, published in the 15th annual report, a mistake was made in the 
plates so that pl. 10 is stated to represent the “ Falls in Flat creek, 
Sprakers, over the Calciferous sandstone,’”’ when in reality it repre- 
sents a view of the falls in the Oniskethau creek, Albany county, 
over Esopus shales. 
