CLAYS OF TUSCALOOSA FORMATION. 51 
Analysis ofluJca clay, Tishomingo County. 
[By W. F. Hand, State chemist.] 
Silica (SiOs) 38. 11 
Alumina (AI2O3) 36. 42 
Ferric oxide (Fe20.3) 11. 73 
Lime (CaO) «0 
Magnesia (MgO) 14 
Sulphur trioxide (S0 3 ) Trace. 
Moisture 87 
Loss on ignition U. 96 
99. 83 
Some of the clay from Lake Como was sent to the Newcomb Pottery in New Orleans 
and was made into ornamental vases. It was pronounced an excellent clay and the ware 
made from it shows it to be a product that is worth investigating. The clay burns to a 
mottled pale red. The larger portion of the clays in the vicinity of Iuka are red to pink in 
color, but farther south they become whiter. 
Turner clay. — In sec. 15, T. 4 S., R. 11 E.,on the farm of James Turner, two samples of 
clays, one white and the other pink, were collected in a branch near the house. They are 
overlain by heavy beds of Lafayette pebbles and sand. At the place of outcrop the branch 
has cut into the hill, forming a small bluff, in which the clay appears. The pink clay is 
within 100 feet of the white clay and appears to be a continuation of the same bed. The 
clays are similar in texture, both free from sand and very plastic. The only apparent dif- 
ference between them is that the pink clay contains a larger amount of ferric oxide. The 
following analysis shows the character of the white clay from the Turner place: 
Analysis of Turner clay, Tishomingo County. 
[By W. F. Hand, State chemist.] 
Silica (Si0 2 ) 66. 85 
Alumina (AI2O3) 20. 54 
Ferric oxide (Fe 2 03) 3. 77 
Lime (CaO) .21 
Magnesia (MgO) 18 
Sulphur trioxide (SO3) Trace. 
Moisture 59 
Loss on ignition 8. 00 
• 100. 14 
Still farther south Crippledeer Creek, which rises near the center of Tishomingo County 
and flows eastward into Bear Creek, has cut through the Lafayette and the overlapping Tus- 
caloosa, exposing the older Paleozoic rocks in its lower course. The cross section of the 
strata along this stream shows the clayey character of the lower Tuscaloosa. 
Penny winkle clay. — On Penny winkle Hill, in sec.8,T. 4S.,R. 11 E,is a white plastic clay, 
which is distinctly stratified. It is purest near the base of the outcrop and gradually passes 
upward into a less pure dark shaly clay. This is in turn overlain by a yellowish-gray sandy 
clay. At the top of the yellow clay is a thin band of ferruginated sandstone, on which rest 
the Lafayette sands. At the bottom of the section the white clay contains small rounded 
quartz pebbles interbedded in the clay. This clay has Ixen used for years for making stone- 
ware. It burns to a light-cream color. The following is an analysis of this clay: 
Analysis of Penny winkle day, Tishomingo County. 
[By W. F. Hand, State chemist.] 
Silica (Si0 2 ) 88. 65 
Alumina (AI2O3) *. 18-99 
Ferric oxide (Fe 2 03) 2 - 77 
Lime (CaO) 20 
Magnesia (MgO) 20 
Sulphur trioxide (S0 3 ) Trace. 
Moisture 1- 09 
Loss on ignition 7. 84 
99.24 
