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 promise 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 Follet 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 5 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 
go 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 toa 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 
