FRANKLIN COUNTY. 99 
It seems probable that the fire clays and the clay shales of Franklin 
County that show rather high refractoriness are capable of being exten- 
sively utilized. The following three exposures along the railroad near 
Ozark were noted by Mr. Kennedy : 
In the SE. J SW. \ sec. 12, T. 10 N., R. 26 W., a bed of fire clay 4 
feet thick underlies 2 inches of broken coal and overlies the black shales 
exposed in the water courses of this district. About 2 miles east of 
Ozark, in the NW. \ sec. 8, T. 9 N., R. 26 W., in a cut on the track of 
the St. Louis, Iron Mountain and Southern Railway, there is an out- 
crop of fire clay 20 inches thick lying immediately beneath 3 inches 
of coal. The section exposed is as follows: 
Section in railroad cut 2 miles east of Ozark. 
Ft. in. 
Flaggy sandstones 4 
Coal 3 
Fire clay 1 8 
Arenaceous shales and thin sandstone at the base. 
Analysis of clay from, railroad cut 2 miles east of Ozark. 
[Brackett & Smith, analysts.] 
Silica (Si0 2 ) -. 62. 92 
Alumina (A1 2 3 ) 23. 60 
Ferric oxide (Fe 2 3 ) 3. 17 
Lime (CaO) 23 
Magnesia (MgO) 57 
Potash (K.,0)1 /T ,.„ . _ „ 
Soda(N % 0)7 (bydlfferenCe) 3 -" 
Loss on ignition (H 2 0) 6. 74 
100. 00 
Water at 110°-115° C 2. 65 
On the same railroad at the end of an embankment in the NE. £ 
NE. | sec. 7, T. 9 N., R. 26 W., a small stream cuts through a bed of 
blue and yellow shales 8 feet thick. These shales are readily disinte- 
grated by atmospheric action and are almost free from sand. They 
are overlain by a bed of sandstone about 1 foot thick. 
In the SE. \ SE. \ sec, 6, T. 9 N., R. 26 W., the following section 
is exposed on a small stream: 
Section on stream in sec. (i, T. 9 N., JR. 26 W. 
Ft. in. 
Thin-bedded gray sandstones 4 3 
Light-grayish blue clay 2 
Coal 6 
Dark-blue clay 2 
Soft black argillaceous shales 5 
The black shales of this section are very friable and easily ground 
into a paste. 
About 3 miles east of Ozark, in the NE. I SE. -] sec. 8, T. 9 X., R. 
26 W., the railroad cutting has been carried through a bed of white 
