78 THE CLAYS OF ARKANSAS. 
The resemblance of this clay to some of the Tertiary clays that are 
used in refining oils is very marked, and its chemical composition is 
not far different from that of those clays. 
Little Cypress Creek kaolin. — This bed crops out in the east bank 
of Little Cypress Creek, in the SW. £ NE. \ sec. 26, T. 7 S., R. 17 W., 
where the following section is exposed: 
Section of Little Cypress Creek kaolin bank. 
Feet. 
Drab sandy clay, overlai'n by soil, etc 7 
Ferruginous shaly sandstone • \ 
Drab sandy clay as upper stratum 5 
White sandy kaolin 6 
The elevation of the base of the section is 320 feet. 
The depth exposed does not represent the full thickness of the 
clay, which forms the bed of the stream and extends to an unknown 
depth below. It passes into yellow sandy clay 100 yards down- 
stream. How far it extends upstream can not be told, for a few 
yards above the exposure the outcrop is covered with debris. 
In J. E. Amis's well, about three-fourths of a mile farther south- 
east, a bed of white sandy clay and white sand, 20 feet or more in 
thickness, was struck at the same elevation. This may represent 
the kaolin bed. (See section of the well, p. SI.) 
In appearance and texture this kaolin clay resembles the commer- 
cial scouring bricks, and it was with the thought of utilizing it for 
this purpose that the sample was collected. When rubbed between 
the fingers it has a lingering soapy feel, and it was washed and 
analyzed to test whether this indicated a constituency of kaolin. 
In refractoriness this kaolin comes close below the best washed 
kaolin from Brandy wine Summit, Pa., which is used in the manu- 
facture of fine chinaware. In chemical composition, however, this 
Arkansas kaolin differs widely from the Pennsylvania variety in 
having more silica and less alumina and water. It is impossible to 
say what effect this difference in composition will have on the phys- 
ical behavior of the clay in firing, but, the refractoriness being so 
nearly the same, the difference in composition will probably have no 
especially marked effect. 
Kilmer kaolin. — A bed of kaolin outcrops on J. R. Kilmer's land 
in the SE. I SE. f sec. 10, T. 7 S., R. 17 W. A white clay outcrops 
in the bank of a drain at the elevation of 390 feet. Between 5 and 6 
feet of the clay is exposed. It contains a great deal of rather coarse 
sand and in its natural condition is only slightly plastic. In the dry 
state the sand easily separates from the finely divided clay mass, 
which gives a very soapy feel when rubbed between the fingers, 
indicating the presence of kaolin. 
