The Monoclinic Pyroxenes of New Yorh State. 155 



ite is also a common associate and scales of it deeply penetrate 

 the crystals. 



The gabbros of the eastern Adirondacks contain a green augite 

 in great abundance. Deep pink garnets occur in close associa- 

 tion with it and the same cracks often traverse both minerals. 

 As has been already mentioned the garnet is probably an alterna- 

 tion product. Reaction rims of hornblende around the augite 

 often separate it from the feldspar. (Ref. 29). Interstitial allo- 

 triomorphic augite occurs in the diabase dikes, south of Port 

 Kent, Essex Co., (Ref. 24), and also iii the diabase, lamprophyre 

 and camptonite dikes of Willsboro and Essex township of Essex 

 Co., (Ref. 54). 



2. The Highland Area. 



Bradley Mines, Monroe Township, Orange Go. — These mines 

 are about three miles northeast of Arden. The bed of mag- 

 netite is cut by a diorite and porphyry dike. Associated with 

 the ore are large quantities of calcite enclosing crj'stals of mag- 

 netite, apatite, augite and titanite, as well as some pyrrhotite. 

 The augite is in granular masses or in short, stout crystals of a 

 dark green color. They all show the planes a (100), 6(010), 

 and m(llO) in the prismatic zone, but the terminal faces are 

 too rounded to admit of positive identification. 



Coldspring, Putnam Co. — Beck (Ref. 2, p. 294) states the oc- 

 currence of p3^roxene at this locality, but gives no further infor- 

 mation about it. 



Greemvood Furnace, Orange Go. — This is another indefinite 

 locality. There are no mines or minei'al localities at the former 

 site of Greenwood Furnace, now called Arden, and most of the 

 ore used was obtained from the Oneil Mine, which has furnished 

 an abundance and variety of mineralogical specimens in past 

 years, so that the crystals labeled Greenwood Furnace very prob- 

 ably came from there. There is also a possibility of their having 

 come from the Bradley Mines, in Woodbury Township, about 

 three miles northeast of the old Greenwood Furnace. 



Beck (Ref. 2) states, however, that pyroxene associated with 

 crystallized mica has been found one-half mile east of Greenwood 

 Furnace. It is green, gray -green and ash-gray. The combina- 

 tion of forms are a (100), 7?i(110), e(011j; a (100), m(llO), 

 e (Oil), c (001) ; a (100), b (010), m (IIOJ), c (001) ; a (100), b (010), 



