688 GEOLOGY OF OHIO. 



ically mixed with silica, alumina, etc. At the outcrops the iron is 

 largely changed to a sesquioxide. 



Ore No. 4 is called the shale ore, and is found in the shales generally 

 about ten feet above the Bayley's Run coal, sometimes consisting of a 

 dozen or more bands of smallish sized nodules extending through four 

 feet of the shale. 



A sample analyzed yielded a trifle over thirty-three per cent, metallic 

 iron. It varies in thickness from two to three feet at the points opened, 

 and gives p'romise of being persistent over a large area. It is exposed 

 in Section 17, Trimble township ; at J. S. Jennings's ford, Section 7 ; at 

 the mill, in Section 8 ; below the mill. Section 16, Dover township ; on 

 George Nye's farm, near Chauncey, and on J. Morris's farm, on Bayley's 

 Run. 



Ore No. 5 is about fifteen feet above No. 3, and is called by Prof. 

 Weethee the " Great Vein Ore," as it reaches a thickness in places of 

 over five feet. One specimen of the unroasted ore yielded forty-two per 

 cent, metallic iron, and the average of several analyses was thirty-five 

 per cent, its outcrop may be seen on Section 17, Trimble township; 

 Section 11, on the FoUet land; on the Moody farm in Fraction 36, on 

 the Blonden, Johnson, and Hope lands, on Mud Fork; on Jones' Run, 

 Fraction 1 ; on the Russell lot, in the village of Trimble ; on the Jen- 

 nings's farm, at the Dug Way, Section 7, and at the mill-dam in Millfield, 

 in Dover township ; also, on Section 6 and 18, Dover township, etc. Its 

 very numerous and heavy outcrops indicate that it may be found at this 

 horizon throughout nearly the whole valley. It consists of layers of 

 nodules, some of quite large size, bedded in shale, some of the nodules 

 containing considerable silicious matter, and others twenty to twenty- 

 five per cent, of carbonate of lime. The iron exists mainly in the form 

 of a sesquioxide, but some of it as a carbonate. 



At the Dug-way, north of the town site of Ewing, the ore is opened up 

 so as to disclose in a vertical height of six feet the equivalent of five 

 feet of solid ore, while above this are five feet of red ferruginous shales 

 containing nodules of rich ore indicating valuable deposits above the 

 massive nodules. The lower stratum is blue, but burns to a black oxide 

 which is highly magnetic, and all the strata appear to lose their silicious 

 character, which marks some of them at the outcrops, as they are follow- 

 ed into the hill. This is a magnificent exposure of the ore ; and several 

 other entries give promise of an equal thickness. Different openings in 

 Trimble and Dover townships give the following measurements of solid 

 ore : Five feet, three feet, four feet, two and one-half feet, etc. There can 

 be little doubt that this fine bed of ore is continuous through all the hills 



