9° NEW YORK STATE MUSEUM 



The stream cut into the rocks overlying the ore and effectively 

 weakened the hanging wall. The channel is now filled with glacial 

 material. It would have been better to have driven a horizontal 

 drift at a lower level until the ore bed was reached and then have 

 followed down the dip. The present methods necessitate pumping 

 and hoisting. 



In 1 91 2 a nearly horizontal drift, then designated as " No. 2," 

 followed the strike of the schist farther to the east than the inclines 

 above mentioned. It was planned to block out the ore between this 

 and the surface, but as the turn from the direction of dip to that 

 of the strike was made too near the portal, there was little ore to be 

 had. 



Still farther east, in loose ground, a drift was attempted. This 

 was to furnish drainage for the " No. 2 " drift but was poorly 

 planned and probably will be abandoned. 



On the south side of the knoll there are three abandoned prospect 

 holes. 



Geology and structure. The area in which the mine is located 

 has been mapped by Cushing, who suggests that the block in which 

 the graphite-schist is found on the property, represents a portion of 

 the same block in which similar beds occur that are now being 

 worked by the Graphite Products Corporation, 8 miles to the east. 



The Grenville rocks are dipping from 30 to 50 southward, vary- 

 ing from a few degrees west of south to S 70 ° W. Cushing is of 

 the opinion that there are two beds of the schist that " are capable of 

 utilization, because of the high graphite and low mica content. The 

 upper bed, from 10 to 14 feet thick, has been the one chiefly worked 

 up to date. The lower bed is much thinner (4 to 5 feet). They 

 are separated by a 4-foot thickness of quartzite and thin limestone. 

 Underneath is a much more solid bed of mica gneiss." 1 



The writer would question whether this parting is sufficiently 

 well defined to separate the ore into two distinct seams. The part- 

 ing consists of limestone and green quartzite layers that pinch and 

 swell, disappear and come in again in a most irregular way. Some 

 of the siliceous stringers are interpreted as metapegmatites of the 

 Laurentian granite. The present miners are operating the total 

 thickness of the rock. 



The graphite rock is at present correlated with the Dixon and the 

 limestone, which is usually siliceous, as the Faxon. The footwall 

 was not observed at any near-by locality but the " mica gneiss " of 



1 Cushing, H. P., N. Y. State Mus. Bui. 169, p. 149. 



