132 ANNALS NEW YORK ACADEMY OF SCIENCES 



importance at a place called Iron Kidgc. This Wisconsii) deposit is iso- 

 lated and unlike the Clinton deposits found elsewhere, both in the shape 

 of the body which appears to have resulted from fillino; of a local basin, 

 and also in respect to the size of the oolites, which are smaller than the 

 oolites found elsewhere and are peculiarly flattened. Professor (irabau 

 of Columbia University (128, p. 77) hais ^suggested that they may be 

 wind-blown deposits in the nature of sand dunes, which have been buried 

 and later impregnated with iron ore. 



I'he ore next appears in ISTew York, beginning near Rochester, where 

 it can be seen in the Genesee Gorge in Monroe County, and then extend- 

 ing eastwardly through Wayne, Oneida, Madison and Herkimer Counties. 

 In this state, the ore is being steadily mined at Ontario and Clinton. 

 The most extensive development is that of the Borst properties, in what 

 appears to be a small bay of the old Clinton sea, covering possibly 2,000 

 -acres near Clinton. Southward, we find the Clinton ores again outcrop- 

 ping in Pennsylvania. Here the deposits extend in a broken belt across 

 the central and southern parts of the state, including Montour, Snyder, 

 ■ Juniata, Blair, Bedford, Mifflen, Centre, Fulton and Huntingdon Coun- 

 ties. These occurrences form a belt of several parallel ridges which run 

 isouthward into Maryland, where they appear in two beds in Allegany 

 County. The ore then passes into West Virginia, where it appears in 

 M-eiTcer, Monroe, Greenbrier, Pendleton, Hardy and Grant Counties. 

 'These West Virginia deposits have been but little used or explored. 



The ores are then found in a few isolated sections along a line passing 

 tlirough the western part of Virginia and including Wythe, Giles, Bland, 

 Taisewell, Russell, Scott, Lee and AVise Counties. These deposits have 

 been worked to a limited extent but are for the most part in a very unde- 

 veloped condition. 



The ore helt then passes through Tennessee, extending across the entire 

 width of the state, a distance of over 150 miles, into Georgia. The Ten- 

 nessee ores occur in Claiborne, Campbell, Rhea, Roan, Sequatchie, Ham- 

 blin and Marion Counties. Here, owing to the much-folded condition 

 of the strata, many seams in parallel ridges appear running in a southerly 

 direction into Georgia. In Georgia, the ore is found in Dade, Walker, 

 Chattooga, Whitfield and Catoosa Counties. The ores of Dirtseller, 

 Gaylors, Taylors Ridges and Lookout Mountain all are of considerable 

 interest. 



From Georgia we find the ore extending into Alabama, where it reaches 

 its greatest development in the Birmingham district. It is found in 

 Shelby, Tuscaloosa, Bibbs, Jefferson, Dekalb, Etowah and St. Clair 

 Counties. 



