THE IRON SERIES CONTINUED. i3 



Adams counties, in the southwestern portion of the State along the 

 flanks of the Cincinnati Arch, but it is thin and poor in iron, al- 

 though rich in fossils. 1 A small area of the Clinton has furnished 

 considerable ore in Bath County, Kentucky, where it is altered to 

 limonite. 3 



2.02.04. Coming eastward, the limestones and the shales of the 

 Clinton outcrop in the Niagara River gorge in New York, but show 

 no ore. This appears first in quantity in Wayne County, a hundred 

 miles east and just south of Lake Ontario. One bed reaches 20 to 

 22 inches. Farther east are the Sterling mines, in Cayuga County ; 

 and again near Utica, in the town of Clinton, which first gave the 

 ore its name, it is of great economic importance. There are two 



cP <3 



'.>5,. THMO' 



= -= ~ =-Tr- Shale ? 



Limestone 0-6 



FIG. 12. Clinton Ore, Ontario, Wayne County, New York. After 

 C. H. Smyth, Jr. 



workable beds, the upper of which, with a thickness of about two 

 feet, is the only one now exploited. Beneath this are 12 or 15 

 inches of shale, and then the second bed of 8 inches of ore. 3 Some 

 25 feet over the upper bed is still a third, which is too low grade 

 for mining. It is four to six feet thick, and is locally called red 

 flux. It consists of pebbles and irregular fragments of fossils, 

 which are coated with hematite and cemented with calcite. 



2.02.05. The rocks of the Clinton thicken greatly in Pennsyl- 

 vania and run southwestward through the central part of the State. 



1 J. S. Newberry, Oeol. of Ohio, Vol. III., p. 7. E. Orton, Oeol. of 

 Ohio, Vol. V., p. 371. 



8 N. S. Shaler, Geol. of Ky., Vol. III., 163. 



8 A. H. Chester, "The Iron Region of Central New York;" address 

 before the Utica Merchants and Manufacturers' Association, Utica, 1881. 

 J. C. Smock, Bull, of N. Y. State Museum. C. H. Smyth, Jr., "On the 

 Clinton Iron Ore," Amer. Jour. Sci., June, 1892, p. 487. 



