QUARRY MATERIALS OF NEW YORK 73 



Forsythe quarry 



The Forsythe Granite and Marble Company of Montreal operated 

 at one time a quarry just north of Thurtso and across the bay from 

 the Kelly quarry. The shore on the west side of the bay rises 

 abruptly 50 feet or more above the water, admitting of a good 

 face directly at the shore line. The quarries extend north and south 

 for about 200 feet. The rock is a little darker on the average than 

 the granite of the Kelly quarry, but otherwise is very similiar. 

 The joints are even more widely spaced and indefinite. The more 

 persistent courses are N. 45° W. and N. 40° E. The grain runs 

 parallel with the latter. Blocks can be obtained of size limited only 

 by the means of handling. The presence of inclusions of darker 

 color is the principal defect. There is a little pyrite noticeable in 

 some of the rock, but it is too small in amount to exert any detri- 

 mental effect in the durability or color of the stone. This is ap- 

 parent in the freshness of the rock at the surface. 



The granite at this quarry shows two varieties of texture, the one 

 being characterized by coarse feldspar crystals of from 10 to 15 

 mm diameter and the other by medium-sized crystals of approx- 

 imately 5 mm diameter. The former found employment for monu- 

 mental and building stone and the latter for paving blocks. 



The quarry is probably the same as that described by Smock under 

 the name of the Thousand Island Granite Company, and active at 

 the time of his report. The quarry was opened about 1880. The 

 product in the early years was mostly paving blocks and was 

 shipped to western cities. Building and monumental stone were also 

 shipped in quantity to Montreal. 



The Forsythe Granite and Marble Company, the last to operate 

 the quarry, ceased work over ten years ago. There is no equip- 

 ment of value remaining on the property. The shipping dock is 

 directly at the quarry. The quarry is now owned by Miss Jennie 

 Forsythe of Montreal. 



A sample of the polished granite from this locality is shown in 

 the large columns that adorn the Senate Chamber of the New York 

 State Capitol at Albany. These are said to have been quarried 

 from near the surface. 



Other quarries near Thurso 



On the farm of W. L. Webster about one-half of a mile east of 

 Thurso is a ledge of red granite, once worked by White and O'Brien. 

 This quarry face is about 200 feet long and 20 feet high. The joint 

 courses are well defined and run N. 60° E. and N. 30° W. There 



