52 NEW YORK STATE MUSEUM 



walls and the slips which traverse it. The slope is about 900 feet 

 long and vertically, 300 feet deep." Further particulars have been 

 given by Professor Kemp. "The dip is very irregular, beginning 

 in the west end with 45 it soon flattens to about 5 and then rolls 

 abruptly over to 6o°. The bed also drops away to right and left, 

 as one descends, having thus a very curious roll, or dome-shaped 

 outline. Swells of ore run into the foot, and smaller veins offset in 

 the same direction. These small offsets are shot ore and very low in 

 phosphorus." In the foregoing accounts no mention is made of 

 the ore which lies to the north of the anticlinal axis as shown on 

 the plan and have a northwesterly dip ; it was exploited in connec- 

 tion with the southern workings. The West End deposit is more 

 extensive than the Penfield, but it is not so thick on the average, 

 though it is said to have given a breast 30 feet across in places. 



The Hammond and No. 8 pits are to the northeast of the Pen- 

 field and higher up the ridge. They are located on the outcrop of a 

 lens which strikes northeasterly and dips 30 southeast. The two 

 pits are nearly connected at the surface but in depth gradually 

 separate following the thicker portions of the lens. The latter 

 shows a breast up to 20 feet thick in the exposure. Toward the 

 edges it rapidly thins out and may be seen to branch off into small 

 stringers of magnetite which gradually disappear in the gneiss. 

 The axis of the lens when continued falls nearly in line with that 

 of the Dog Alley mine, the shaft of which is about 600 feet from 

 the nearest workings of the Hammond. A transverse fault is said 

 to intervene between the two mines though they were considered 

 to be on the same deposit. 



As shown by the accompanying plan the Dog Alley is a long 

 narrow body or shoot. It was tapped at the north by a vertical 

 shaft which encountered the ore at 250 feet. It was one of the 

 last to be worked. It yielded a large quantity of high-grade ore. 



Mine No. 7 lies southeast of Hammondville on the edge of the 

 belt where it falls away sharply to Burnt Mill valley. There are 

 two slopes following a lens that dips 35 southeast. The main 

 slope runs along the foot -wall and is stated by Smock to be nearly 

 1000 feet long. The ore is reported to have been 20 feet thick in 

 places. Three diabase dikes intersect the ore body which is also 

 faulted twice, with a displacement of 10 feet in one instance and 

 of 11 to 22 feet in the other. Much of the waste rock on the dump 

 shows the results of shearing with chloritization of the feldspar. 

 The ore has been changed in part to martite and is veined by 

 calcite, jasper and fluorite. The deposit gave out abruptly at the 



