64 GEOLOGY AND MINERAL RESOURCES OF MISSISSIPPI. 
Analysis ofCallicoatt clay, Lafayette ( 'ounty. 
[By W. F. Hand, State chemist.] 
Silica (Si0 2 ) 68. 75 
Alumina (A1 2 3 ) 19. 57 
Ferric oxide (Fe 2 3 ) 1. 68 
Lime (CaO) 56 
Magnesia (MgO) 19 
Sulphur trioxide (S0 3 ) 13 
Moisture 90 
Loss on ignition 6. 1 7 
97.95 
Moss clay. — This clay outcrops in a deep gully on the public road just in front of a negro 
cabin on Robert Moss's land. The Lafayette rests directly on the clay, which occurs in a 
lenticular mass in the variegated sands of the Wilcox formation. The clay is free from grit, 
very fat, and has a pinkish tinge. The thickness of the deposit is at least 10 feet. Below 
is an analysis of the Moss clay: 
Analysis of Moss clay, Lafayi tie County. 
[By W. F. Hand, State chemist.] 
Silica (Si0 2 ) 70. 56 
Alumina (AI2O3) 19. 03 
Ferric oxide ( Fe 2 O a ) - 2. 27 
Lime (CaO) 49 
Magnesia (MgO) L3 
Sulphur trioxide (SO3) 19 
Moisture 63 
Loss on ignition .". 6.66 
99. 96 
Miller clay. — In the vicinity of George Miller's house, in sec. 8,T. 8 S., R. 3 W.,are large 
bodies of very lean, nonplastic soapstone or clay which often cover an acre or more. The 
clay is almost snow white and, where the Lafayette has been removed, can be seen for a long 
distance before reaching the outcrop. These deposits occur in horizontal lamina) one-fourth 
inch to 2 inches thick. More or less mica is present throughout, with a large amount of 
highly siliceous material. This clay has been analyzed with the following results: 
Analysis of Miller day, Lafayette County. 
[By W. F. Hand, State chemist.] 
Silica (Si0 2 ) 85. 78 
Alumina ( AI2O3) 6. 68 
Ferric oxide ( Fe 2 O a ) 1.30 
Lime (CaO) 48 
Magnesia (MgO) 14 
Sulphur trioxide (SO s ) 32 
Moisture 73 
Loss on ignition 2. 37 
97. 80 
Oxford clay. — A sample of clay was obtained from the deep gully near the colored-school 
building in the town of Oxford. On all sides of the town the variegated coarse sands of the 
Wilcox appear in the gullies and along the roads and railroad. The sand is highly cross- 
bedded. The sample of clay was taken in this cross-bedded sand at the base of the Lafay- 
ette. The clay is plastic, free from grit, and burns to a white color. The following is an 
analysis of this clay: 
