Char TER ALT. 
THE BLOCTON BASIN. 
The Blocton basin is situated to the south and southwest 
of Bessemer, to the southeast of Woodstock and Vance’s, 
to the north of Centreville, to the west of Aldrich and 
Montevallo, and to the southwest of Gurnee, Blocton oc- 
cupying the middle portion of the basin. 
This basin is bounded on the north by the Gould basin, 
on the northwest by the Sub-Carboniferous measures, at the 
visible portion of the southwest end it is bounded by a 
large deposit of “Drift measures” overlying and completely 
hiding the Carboniferous from sight, on the south it is 
bounded by the great boundary fault, and on the southeast 
side it is bounded by the Interior fault vertical coal meas- 
ures, beyond which is the Dailey Creek basin. 
The following is a description of the boundary of the 
Blocton basin: Commencing at the northwest edge of the 
Interior fault opposite Booth’s Ferry in the south half of 
section 19, township 21, range 4 west; thence northwest 
along the Booth’s Ferry and Tannehill wagon road, to the 
sharp bend in Sand Mountain in the south half of section 
8, township 21, range 5 west; thence northwest along the 
base of the Millstone Grit nearly one mile, to where Sand 
Mountain makes another sharp turn ; thence southwestward 
along the base of the Millstone Grit of Sand Mountain; 
the red fossiliferous‘ore cropping out about half a mile to 
the right. Then crossing the Cahaba Coal Mining Com- 
pany’s Railroad at “Thrasher’s Mill,” on the township line, 
between townships 21 and 22, and continuing along the base 
of the Millstone Grit, crossing Hill’s Creek about three- 
quarters of a mile northwest of Randolph’s Mill, and cross- 
ing Schultz’s Creek at Burt’s Mill; thence along the base 
of the Millstone Grit to the half mile post on the south side 
of section 22, township 24, range 8 east. To the southwest 
