60 GEOLOGY AND MINERAL RESOURCES OF MISSISSIPPI. 
Analysis of Ballard clay, Marshall County. 
[By \Y. F. Hand. State chemist.] 
Silica. (Si0 2 ) 03.95 
Alumina (A1 2 3 ) 21. 42 
Ferric oxide (Fe 2 O s ) 3. 88 
Lime (CaO) 39 
Magnesia (MgO) 73 
Sulphur trioxide (S0 8 ) 29 
Moisture 1.71 
Loss on ignition 7. 39 
99.79 
Red Bank clay. — One of the best localities for studying the lenticular character of the 
Wilcox is in the high divide between the waters of Chewalla Creek on the north and Red 
Bank Creek on the south, in the vicinity of Red Hank station, in sec. 16, T. 3S.,K. 1 W, 
About one-half mile south of the station is a large abandoned field from which the Lafayette 
has been mostly eroded. In places the gullies are washed out 20 feet deep and the whole field 
is fantastically carved into miniature landscapes. The Wilcox here contains numerous 
lenses of white,gray, and pink clays, many of which are highly plastic and free from sand. 
In places the gullies are deep enough to show the full thickness of the clay deposits — not 
more than 3 to 4 feet on an average. A sample of clay was taken from a large lenticular body 
on the roadside one fourth mile south of the church. It burned to a bull" color and is 
flecked with small brown to reddish spots. Below is an analysis of the Red Bank clay. 
Analysis of Bed Bank clay, Marshall County. 
[By W. F. Band, State chemist.] 
Silica (SiOa) 65. 88 
Alumina (A1 2 8 ) 21.19 
Ferric oxide ( Fe 2 < > 8 ) 2. 89 
Lime (CaO) 72 
Magnesia (MgO) 15 
Sulphur trioxide (S0 3 ) 30 
Moisture 1.23 
Loss on ignition 7.02 
'.ci. ;;s 
Hern clay. — This deposit occurs on the roadside about 3$ miles north of Holly Springs 
and aboul one-half mile north of the old pit from which the Holly Springs Stoneware and 
Fire-Brick Company formerly obtained clay for making stoneware. The Hern clay occurs 
in stratified layers with sand partings. It has a bluish tint, is very plastic, and burns to a 
buff color very similar to thai of the Mvd Bank clay. Its relation to the Lafayette is shown 
in t he section below. 
Section 3\ miles north of Holly Springs. 
Feet. 
4. Lafayette sands with ferruginous sandstone at base 10-12 
3. Stratified plastic clay of a bluish tint, in places containing a small amount of sand 3 
2. Gray laminated clay 1 to 4 inches thick, alternating with layers of gray sand of about equal 
thickness 4 
1. Yellowish laminated sand and clay containing nodules of iron oxide 5 
This clay has been analyzed with the following results: 
Analysis of Hern clay, Marshall County. 
[By W. F. Hand, State chemist.] 
Silica (SiOs) 00. 78 
Alumina (A1 2 3 ) 21. 12 
Ferric oxide (Fe 2 3 ) 3. 52 
Lime (CaO) 73 
Magnesia (MgO) 38 
Sulphur trioxide (S0 3 ) 38 
Moisture 1. 84 
Loss on ignition 8. 25 
100.00 
