ADIRONDACK MAGNETIC IRON ORES 55 



amounted to over 400,000 tons so that the entire product may be 

 stated in round numbers at 2,000,000 tons. 



Skiff mine. This mine, opened by the Horicon Iron Co. and 

 later worked by the Lake Champlain Ore & Transportation Co., is 

 near the east end of Skiff mountain 2 J miles southeast of Ham- 

 mond ville. It is about 500 feet above the valley of Burnt Mill 

 brook. The deposit at the surface ranges from 3 to 6 feet wide 

 thinning at either end. The strike is n. 70 e. and the dip is 8o° 

 south. Most of the ore has evidently been taken from the open 

 pit, which is about 300 feet long; on the west side a shaft has been 

 sunk, but its depth is not known. The ore averages fairly rich, 

 probably about 50 per cent iron. Quartz is the most common 

 ingredient of the magnetite. The wall rock resembles that sur- 

 rounding the Hammond ville deposits, but is more silicious and 

 rather coarser in texture. 



The analysis below is quoted from Maynard's paper. (Maynard 

 and Wendell, analysts) 



Fe 2 3 47.59 



FeO 21. 41 



Si0 2 20.65 



S 86 



PA 18 



A1 2 3 4-09 



MnO .27 



CaO 4.06 



MgO 1.08 



100. 19 



Iron 49 . 96 



Phosphorus .079 



Manganese ■ .21 



Long Pond mine. This is nearly opposite the Skiff mine on a 

 parallel deposit which outcrops along the southern slopes of the 

 ridge. It is entered from the surface by a short adit driven at a 

 point 100 feet below the outcrop. The ore is gathered into parallel 

 seams separated by the wall rock and dipping together at an angle 

 of 6o° south. The two principal seams are each about 18 inches 

 thick. A second adit was run below the first to tap the deposit at 



