454 NEW YORK STATE MUSEUM 



B^ Thick massive limestone fucoidal specially at 

 the lower part. Fucoidal member of Calciferous. I35'= 183' 



B^ Just north of the Walker quarry in a small 

 quarry at the head of a run south of an old lime- 

 kiln, one foot of bluish drab, fine grained, compact 

 limestone which weathers ash-gray. The outlines 

 of several obscure fossils are visible on the upper 

 surface of the layer, which rests on Calciferous 

 sandrock. Birdseye. i'=i 184' 



B* Above no. 3 are about 5 feet of thin, blue- 

 black, fine grained, irregular, lumpy layers weather- 

 ing light ash-gray, and fossiliferous specially 

 abounding in Columnaria alveolata 

 Goldfuss. In eastern side of quarry the rock is 

 in thicker layers, the lower containing Colum- 

 naria. In the larger opening to the east the 

 Columnaria bearing layers are capped by 

 gray crystalline rock. Black river. 6'= 190' 



B^ In the Walker and Moore quarries the lowest 

 rock exposed is dark bluish to grayish, crystalline, 

 massive and weathers bluish gray. It is very fos- 

 siliferous. Trenton. 8'= 198' 



B^ Thin, irregular, dark blue, fine grained lime- 

 stone layers with much intercalated black shale. 

 Highly fossiliferous. Trenton. 14'== 212' 



B"^ The nearest exposure of shales occurs about 

 50 feet above no. 6 in an open ditch on the northern 

 slope of the hill. The sandstones of the Hudson 

 river stage are exposed at an altitude of approxi- 

 mately 1200 feet A. T. The lower limit of the 

 Hudson river at this point is probably nearly iioo 

 feet A. T. From highest exposure of Trenton to 

 probable base of Hudson river, 888 feet. Utica. 888'=iioo' 



The fauna of the Black river, no. 4, is as follows: 



1 Stromatocerium rugosum Hall (r) 



2 Stictopora ramosa Hall (c) 



3 Stictopora labyrinthica Hall? (r) 



4 Monticulipora (Prasopora) lycoperdon Say (c) 



