CAHABA COAL FIELD: HENRYELLEN BASIN. 25 
very micaceous; this sandstone is a good land mark to 
guide in locating the measures of this part of the basin. 
Above this you find the 15-inch Rusty coal seam, and above 
it, should be found the Wadsworth.* 
Keeping your course along the direction of dip, in going 
over the next 900 feet of measures, you will pass over the 
outcrop of seven different seams, varying in thickness from 
six inches to four and a half feet. (See sections on map for 
details). You will then arrive at a very coarse, massive 
sandstone. This is the foot wall, or bottom rock, of the 
Mammoth seam. This coarse sandstone, in various parts 
of the Cahaba Coal Field, becomes a conglomerate ; visibly 
so at the Henryellen mines and at a point close to the Gur- 
nee mines in the southern portion of the Cahaba Field. 
The Mammoth seam, in the north end of this basin, has 
an aggregate thickness of over eleven feet of coal, and has 
the following section measured by myself: 
* I saw what I considered the Wadsworth seam in the northern part 
of the basin, but was not quite positive of its identity. Anyhow, this 
is the proper position for it, and I am convinced that future explora- 
tions will expose it, yet itis impossible to say what its thickness will 
be. Near Helena the Wadsworth is over three feet in thickness and 
makes a very good coke for the smelting iron. 
