v s 1_' yoi:k state m 



in : furnace, whi n Bhipped to Troy, and at 



tiin< I for lime manufacture. ** 



Th- and in Cornelius McCafFery's quarry. The 



rlv 60 feet thick, rather flinty in the upper 

 it in the lower yielding stone which analyzed: 



1.2 



ric oxid 1.5 



Alumina 2 



lime S4.ll 



8.97 



b' 



St Lawrence county 1 



The Trenton-Chaay limestones extend along the St Lawrence 

 river from Chippewa Bay to the northeastern edge of the county. 

 Their southeastern boundary passes through Flackville, Xorwood, 

 S >ckholm, Brasher Falls and Fort Covington Center. 

 Ogdensburg the stone has been quarried for lime manufac- 

 ture about a mile west of the town. The stone is thin bedded, 

 and only the upper layers of the quarry are used for lime. 



The following analyses show not only the dolomitic character 

 of the rock but also the greater freedom from silica of the upper 

 lay. 



Upper Btone, Howard's quarry. Ogdensburg: 



4.42 



Alumina 2.23 



Fc id .16 



(■ carbonate 55. S7 



dum carbonate 37 . 71 



100.42 



■ H. jr. • 1 reconnaissance in the vicinity of Gouver- 



» 12: 97) 



Prelii urination of the general and economic geology of 



f°"' tt fi • and Jefferson counties, N. Y. (*ee 47th" an. 



I N. V. 587) 



