CAHABA COAL FIELD: OVERTURNED MEASURES. 97 
and the Cannel seam are all overturned ; they all outcrop 
on Little Mayberry Creek and on the Big Mayberry Creek. 
The four hundred feet of conglomerate and sandstones next 
the fault, forming the north boundary of the Overturned 
Measures, is a part of the top or cap rock of our Alabama 
Coal Measures ; this is the lower part of the great Monte- 
vallo conglomerate. In examining all the above mentioned 
seams, the bottom slate was found to be on top in every 
case. a. 
The angle or rate of dip of these seams, varies from fifty- 
six degrees at the Cannel seam, to sixty degrees at the 
Cooper seam. I have examined these measures closely 
along their outcrops for over seven miles, and find them 
overturned the whole of that distance. The best point for 
examination of this portion of the Overturned Measures, is 
on Little Mayberry Creek about five hundred yards west of 
the old shaft or slope. The old shaft or slope was worked 
by the Montevallo Coal Mining company twenty-nine years 
ago, under my superintendence ; I had then an excellent 
opportunity to obtain a thorough knowledge of that part of 
the Overturned Measures. 
The Little Mayberry Creek at this point cuts in a direct 
course through the steep dipping measures that contain the 
above mentioned seams. The relative position of these 
seams is as follows: Commencing at the “fault” on Little 
Mayberry Oreek, where you can put one foot on the Over- 
turned Measures, dipping at a rate of sixty degrees, and 
the other foot on the flat measures of the Montevallo Basin 
dipping only two or three degrees ; thence southward down 
the creek, passing various ledges of conglomerate inter- 
larded with sandstones on the way, a distance along the 
surface of three hundred and ninety feet (390); you have 
now passed over three hundred and thirty-eight (338) feet 
in thickness of measures. This brings you to the Dodd 
seam, and you have just passed over three hundred and 
thirty-eight feet of the lower part of the Montevallo con- 
giomerate, The Dodd vein is the Montevallo seam. Con- 
tinuing down the Little Mayberry Creek seventy-three feet 
a See Chapter I, and Introductory Chapter for further mention of the 
reversal of the strata. 
