924 GEOLOGY OF OHIO. 
The structure of the seam is as follows: 
FLGURE XARW 
STRUCTURE rae LOWER FREEPORT 
COAL AT EBO. 
ee ween ES. : sopeenet _ 
Partinag---—— pious. Slants Sees 
The seam shows very great steadiness here, which goes some ways 
towards compensation for its light volume. Itis opened everywhere, and 
everywhere shows the same structure and thickness. It seems reason- 
able to believe that the coal extends straight on to the river where it is 
the famous Shaft seam, with, no doubt, occasional ‘“‘ wants.” 
The parting in the seam is higher here than at Steubenville, and 
the coal is more blocky and stronger, but it is at the same horizon 
without doubt. 
The entire absence of the Upper Freeport coal is to be noted in 
the section given. The limestone and clay are very steady, and very 
characteristic, but there is not a hint of coal. The same line of facts, 
it will be remembered, exists at Steubenville. The Big Vein must then 
be dropped from the resources of the district. To compensate for this 
in part, there is found in the Dorrance coal a fine development of the 
Brush Creek seam. It is 34 feet thick where measured, and is known 
as the 4 feet seam. It has no parting. The coal is not, however, 
steady, but in a few openings that have been made on the Kelly farm 
has proved quite the contrary. Good areas of it, however, are sure to | 
be found. The quality is of the usual excellence. These three seams, 
a 3% feet seam that is of excellent quality, but unsteady, a 3 feet seam 
that is unusually steady and of fair quality, and a possible 3 feet seam, to 
