REPORT OF THE DIRECTOR AND STATE GEOLOGIST 1900 t1d9 



larger openings are north of Midland avenue. The one now 

 worked has been opened for a distance of 250 feet along the 

 strike, and has been worked backward (toward the west) about 

 200' feet. The space worked out is filled up with waste rock. 

 The foliation planes strike n. 22° e. and dip 70° to 90° w. One 

 almost horizontal set of joints, dipping slightly to the east, 

 divides the rock into 4 to 12 foot " beds." A less regular set 

 strikes n. 65° w. and dips 67° w. One derrick is in use — horse 

 power. Four quarrymen and a foreman are employed. The 

 quarry was opened in 1892, and got much of the railroad work. 

 Two schools were lately supplied, the cut stone being valued at 

 about 15.50 a yard at the quarry. Smaller cut stone is sold, 

 delivered, at about 30c a cubic foot. The annual product 

 amounts to about 2000 cubic yards rough stone, valued at about 

 50c a cubic yard at the quarry; and about 100 to 200 cubic yards 

 of dressed stone. 



As in all the Yonkers gneiss quarries, black powder is used 

 when necessary, but much of the stone can be gotten out by use 

 of the plug and feathers. These are always used for splitting 

 the stone to size after it has been broken out in blocks. The 

 stone stands bush hammering well, and this is about the highest 

 finish ever given it. 



O^Rour'ke's quarri/ (17). Worked on lease by E. O'Rourke of 

 Dunwoodie on land belonging to the Stewart estate. Opened 

 for 65 feet along strike, 25 feet on dip, 15 to 20 feet deep. 

 The opening is shown on pi. 50. Foliation jjlaces strike n. 32° e. 

 and dip 66° e. The stripping was about 6 feet. Annual prod- 

 uct about 1000 cubic yards foundation stone, at |1.75 a cubic 

 yard, delivered, and 600 cubic yards cut stone, valued at |4000. 

 This quarry shows a larger percentage of high grade stone than 

 do any of the others. It was opened too late to get much of 

 the railroad work, except the piers of the trestle at Lowerre, but 

 gets a fair share of public and private work. 



Flannenfs quarry (13). This quarry was worked irregularly 



by the owner of the land, Flannery. He is a builder 



and the product was used exclusively on houses which he built. 



