lOO NEW YORK STATE MUSEUM 



. side of the neighboring 1453 foot hill another small opening has 

 been made. At the latter, the ore lies at or near the contact of a 

 dark basic syenitic gneiss below and a light acidic gneiss above, 

 just as at ^Nlineville. At the more southerly openings the rock is 

 again basic syenitic gneiss. Between the two the geological rela- 

 tions are somewhat complicated. Pegmatites and granitic rocks 

 occur, suggesting that intrusive granites are present, as indeed they 

 are in evidence on the southeast. 



No. 2. Lee mine. This opening is just in the outskirts of Port 

 'Henry and in a little hillock with abrupt north and east sides 

 which rise from a valley covered with sand. The nearest rocks 

 both to the east and west are the Grenville limestones and their 

 associates, but faults cjuite certainly intervene between them and 

 the mine. Its wall rock is a granitic gneiss, whose dark silicate 

 is biotite. It is reddish in color and somewhat different both in 

 minerals and appearance from the greenish syenitic wall rocks, 

 elsewhere met with the ores. The ore strikes n. 20° w. and dips 

 about 19° westward into the hill at the more northern slope, but 

 swings around to the southeast and steepens to a 30° dip on the 

 south. B. T. Putnam visited it in 1880, for the Tenth Census 

 [15:115], and has left a plan and sections. The mine is cut off 

 on the north by a trap dike with an east and west strike. The 

 dike can be traced across the hills to the eastward. 



The pit is now full of water and serves as a dumping ground 

 for refuse from the neighborhood. Putnam saw the mine when 

 active and states that 9 feet of pyritous ore was displayed in the 

 face. In old pillars a cross section can still be seen of lean, horn- 

 blendic ore. Putnam's analyses of samples from two lots, one of 

 2500 tons from the north slope, and one of 1500 from the south 

 yielded the following. The sulfur, however, was for some reason 

 not determined although it is the chief point of importance after 



the iron. 



1 2 



Iron. 4501 44-38 



Phosphorus -047 -04 



The ore is of low grade but the phosphorus is also low. 



No. 3. Crag Harbor ore body. This is described by Ebenezer 

 Emmons in the report on the Second District, page 236, as occur- 

 ring in a cliff, 50 feet above the lake and half a mile below (north 

 of) Port Henry and as being the most conveniently located of all 

 'the ore bodies in the reeion. It was 12 feet wide, in hornblende, and 



