916 GEOLOGY OF OHIO. 



Logan. Here it shows quite a heavy blossom in the road near M. Keigley's 

 house. 



This seam is the exact counterpart of the true No. IV,. underlying the 

 southern Gray Limestone just as Coal No. IV underlies the northern Gray 

 Limestone. The name assigned to it in the scale is Coal No. IVa. 



8. It is to be noted that the part of the series which we have now 

 reached is, by far, the most crowded of the Lower Coal Measures. The 

 barren intervals are here greatly reduced, and a rise of more than twenty 

 feet is seldom required in order to reach a new horizon of coal or ore. 



The four last named seams belong to this crowded series, as do the four 

 that follow. 



In regard to the numbers of the coals that follow, no responsibility is 

 here assumed. The Upper New Lexington Coal has been pronounced by 

 the geologists who have worked in that district as No. VI of Dr. Newberry's 

 classification, and the Lower New Lexington Coal has been made No. V of 

 the same scheme. A connection is claimed to have been made between 

 the Upper New Lexington coal and the Straitsville seam. That connec- 

 tion is not called in question, but in numbering the coals that follow 

 No. V, No. VI, etc., no reference is made to the eastern extensions of these 

 numbers; but in speaking of No. VI the Straitsville or Nelson ville seam 

 is referred to, and No. V is applied to the first general seam below it. 



With this qualification, then, it may be added that Cokl No. V is the 

 seam next met. Its position is about ten feet above the limestone or 

 Baird ore at the northward, and about twenty to twenty-five feet above 

 the same horizon, south of Vinton county. In working the Baird ore 

 the place of the coal is almost always shown. Another seam is frequently 

 found from ten to fifteen feet above it, which is often confounded with it. 

 Both are thown on Washington Furnace lands and at many points in 

 Vinton county in the same hills. The lower of the two is the main seam. 

 It is c Jled the New Castle Coal in Lawrence county, where it yields a 

 large amount of fuel, being extensively worked in the vicinity of Iron- 

 ton. It is here a coil of fair quality, but not adapted to iron manufac- 

 ture. Coal No. V is not worked elsewhere in the district to any extent. 

 At NelsoQville it holds a thickness of between two and three feet, and, as 

 tradition says, was the first coal ever opened there. It is at present eo 

 entirely overshadowed by the great coal seam above it — No. VI — that its 

 prc;sence id quite lost sight of. It may be added that it is a remarkably 

 constant getjlogical feature of the whole field. It is scarcely necessary to 

 lose sight of it between Perry county and the Ohio River. 



9. The coal that comes next in order is, by far, the most important of 

 Ohio coils, viz., No. VI, of Newberry's clafsification. It is found at a 



