94 GEOLOGICAL SURVEY OF ALABAMA. 
basin that has the Montevallo seam under its surface, con- 
tains all the workable seams of the Cahaba Coal Field. 
The rate of dip of the measures of this basin, varies from 
9° to flat or level measures in the synclinal part of the 
basin ; a large area along the synclinal of this basin is per- 
fectly level. 
For a distance of about two miles west and northwest of 
Aldrich depot on the Brierfield, Blocton and Birmingham 
Railroad, the Montevallo seam has been worked by various 
companies in the past thirty-four years ; at present the only 
parties engaged in mining it are the Montevallo Coal and 
Transportation Company, of which William F. Aldrich is 
president, and James L. McConaughy, secretary and treas- 
urer. They have a good mire opened on the seam by slope, 
and are well able to supply the present demand for Monte- 
vallo coal. 
The 500 feet of measures above the Montevallo seam are 
a series of conglomerate ledges interlarded with pebbly 
sandstones and with sandstones. About the middle of these 
measures there is a fifty feet layer of dense conglomerate; 
this forms several “falls” on the creeks and branches of the 
Montevallo and Lolley basins; the four thin seams “Air 
Shaft,” “Black Fireclay,” “Stine,” and “Luke” are imbedded 
in the above mentioned 500 feet of measures. 
The layers of conglomerate vary in thickness and posi- 
tion; the plate next above the Montevallo seam is at places 
close down on the seam, while at other places it is 35 to 40 
feet above it. 
Analysis of coal from the Montevallo seam, from Montevallo 
Coal and Transportation Company’s slope, Aldrich, Ala., 
by J. L. Buson : 
MGISGURG cack GaGG cave deka Saecaneds nt 1.858 
Volatile matter.......... 0.0.20. 0 00 36.592 
Fixed carbon.......... ce cece cece eee 54.002 
SEN CATT OG AE AGEN 7548 Coke........4. 61.550 
100.000 
Sulphur in coal.......... cece eee eee 1,726 
Sulphur left in coke.............004. 1.156 
Per cent. of sulphur in coke......... . 1,878 
