48 Bulletin of the New York State Museum. 



that time. The total product is estimated by Mr. Chas. S. West- 

 brook, manager, to amount to 500,000 tons. 



CLARK AND PIKE MINES, Eossie, St. Lawrence County.— 

 One-fourth of a mile north-east of the Kearney mine the Gouverneur 

 Iron Ore Company has opened on adjoining properties what are 

 known as the Clark and Pike mines. They are on opposite sides of 

 a low ridge of sandstone (Potsdam) and in a synclinal fold of this 

 formation. The first openings consisted of pits sunk on the north- 

 east slope of the ridge. The Pike shaft is situated a few rods to the 

 north-west of the old workings : the three slopes of the Clark mine 

 are at the south-west border of the hill and on the north-east dipping 

 ore bed. The greatest depth reached is 120 feet — on the slope. 

 The ore has been found to vary in thickness, because of the undulat- 

 ing foot wall, the hanging wall being more nearly uniform in its dip. 

 Some hematite occurs in the latter, in thin layers in the sandstone, 

 and the workings are not carried to the ore limit in that direction. 

 The three slopes are located within a length of 300 feet on the 

 course of the ore bed. The average dip is stated to be 38°. The ore 

 of this mine has a more laminated structure than the ores of the 

 district in general. It is reported to run as high as 50 per cent, 

 of metallic iron, and to make a good foundry iron. The Pike shaft 

 is idle. It is not as deep as the Clark mine. The mining plant is 

 comparatively extensive, including two hoisting engines, one Cornish 

 pump, two steam pumps ; and branch railroads connect the mines 

 with the main line of the R. W. & O. E. E., 100 rods to the south-east. 

 These mines were opened by John Webb, Jr., of Gouverneur, the 

 present manager, in 1880, and, excepting two years, have been worked 

 to the present time. The total out-put is reported by Mr. Webb to 

 be 45,000 tons. 



LOWDEN MINE, Hermon, St. Lawrence County. — This local- 

 ity was abandoned in 1877 by the owner, A. Pardee, of Hazleton, Pa.? 

 after a thorough search for a workable deposit of ore. 



IV -THE CLINTON OR FOSSIL ORES. 



« 



In the town of New Hartford the Clinton ore bed has been opened 

 at the Davis Mine, one mile east of Washington Mills, and at 

 Chadwick's, four miles south of East Utica. A little ore was dug at 

 the latter place last summer (1888). The Sauquoit Creek has eroded 

 the formation and its continuity is broken, going west. 



