THE ADIRONDACK GRAPHITE DEPOSITS 



53 



road the dike is exposed with a width of 40 feet, penetrating the 

 thicker member of the Dixon schist on the south side of the road; 

 but instead of behaving in a normal way and reaching to the surface 

 it has expended its energy in splitting this seam by forming a large 

 mushroom mass (laccolith) about 270 feet in length. This unusual 

 laccolithic mass is chiefly confined to the west side of the main body 

 of the dike. The rock itself is normal Adirondack diabase, olivine 

 free, exhibiting chilled margins and is being quarried for surfacing 

 the road. 



LvflF-^ 



DIABASE 



GRAPHITE RK 



QUARTZ1TE | - zz\ GARNET RK 



g^ LIMESTONE 



'SO' 



Fig. 8 The laccolithic diabase dike on the 

 Faxon property, not far from the old 

 workings. The new state road has cut 

 through this mass of diabase, revealing 

 the fact that the dike formed a laccolith 

 which splits the Dixon schist. Look- 

 ing south. H. L. Ailing, 1917. 



Just back of die camp and running northwest is a fault, recognized 

 by Air Newland, that offsets the ore, as can be seen from the 

 geologic map. Across Faxon pond to the south another fault is 

 indicated cutting across Swede Pond mountain. As these two faults 

 are drawn it would appear that they are separate affairs, but it is 

 quite possible that a little more care in the field would reveal the fact 

 that it is the same fault. From a study of the drill records kindly 

 furnished by Air Faxon, although difficult of interpretation due to 

 insufficient data, the writer suggests the possibility of a fault of 

 small displacement running from hole 4 in the 'Wheeler lot south- 

 west through the ponds between holes 3 and 7 (of the Faxon 

 group). This is the North Pond fault. Another, trending east and 

 west from hole 7 continued to the old road, where well-defined 



