42 THE CLAYS OF ARKANSAS. 
are of drab color and are exposed in the stream to a thickness of 5 
feet or more. 
No pottery clays are known in the Crowleys Ridge region. It is 
probable, however, that local deposits may be found in some of the 
low grounds of the slashes of the region. 
Throughout the Crowleys Ridge country, wherever erosion has gone 
deep enough to reach the cross-bedded Tertiary sands, it has exposed 
numerous thin undulating strata of bright-red, pink, purple, gray, 
white, or yellow ochers. In certain localities, as in the Prussian 
Jewish Cemetery at Helena; at Double Head Bluff, in St. Francis 
County; at Wittsburg, on Wolf Creek, in Poinsett County; at Gaines- 
ville, in Greene County, and at Chalk Bluffs, in Clay County, these 
clays are found in abundance. Commonly, however, they are much 
intermixed with sands and are very patchy in their occurrence. 
The only uses to which they are known to have been put are for 
painting outbuildings and fences and in dyeing cloth. Since they are 
so local in occurrence and are commonly found in small quantities 
they are not believed to possess any economic value. 
Analysis of pink clay from Gainesville, Greene County. 
[Specimen dried at 110 o -115° C Brackett & Smith, analysts.] 
Silica (Si0 2 ) 71.17 
Alumina (A1 2 3 ) 18. 44 
Ferric oxide (Fe 2 3 ) 2. 77 
Lime (CaO) 25 
Magnesia (MgO) 44 
Alkalies, by difference 90 
• Loss on ignition 6. 03 -* 
100. 00 
Air-dried sand in air-dried clay 14. 52 
In the roadway on the west edge of the village of Gainesville several 
feet of this clay outcrops in pockets. There is no continuous deposit 
of it in the immediate vicinity of the village, though one occurs in 
deep washes near the roadway in sec. 32, T. 18 N., R. 5 E. In this 
locality the pink pipe clay occurs in beds that range in thickness 
from 4 to 15 inches and are separated by cross-bedded white sands. 
At Wittsburg there is another deposit of pipe clay which is charac- 
teristically patchy and wanting in continuity. In the west edge of 
the village, in a gulley crossed by the roadway leading to Wynne, 
there are beds of pipe clay that are in places as much as 3 feet thick. 
In color they range from white to deep red, through drab, yellow, and 
pink. A sample of the red and pink clay of this locality was analyzed 
with the following results : 
