58 THE CLAYS OF ARKANSAS. 
clay is very fine, only a little more than 1 per cent of it being caught in 
a sieve having 150 meshes to the inch, the remainder passing through. 
This lower bed, like that at Perla, contains many impressions of 
leaves and stems of plants; indeed, the whole section seems to be 
very similar to the clay pits at that place. 
It is reported that clays similar to those found in Bailey's well have 
been passed through in digging several wells in the neighborhood, and 
that in some of them the lower brown clay has been penetrated to a 
depth of 10 or 12 feet without having been passed through. 
CLAY INDUSTRY. 
The Mclntyre Company has a small brick plant at Magnolia. The 
plant was established in 1884. Surface clay is used, from which is 
made a red common building brick. The bricks are molded by hand, 
dried in the open air and sunshine, and burned in an up-draft kiln. 
About three days are necessary to dry the bricks sufficiently to place 
them in the kiln; nine days are required for burning. Wood is used 
as fuel. The output is 5,000 a day. The molds are 8J by 4{ by 2\ 
inches. 
CONWAY COUNTY. 
GENERAL GEOLOGY. 
The general geology of Conway County is the same as that of 
Faulkner County, and the clays of the two counties are therefore of 
the same character and have the same geologic distribution. 
The surface rocks in Conway County, except the later deposits 
along Arkansas River, are entirely in the " Lower Coal Measures." 
The hard rocks are alternate sandstones and shales that lie nearly flat 
in the northern part of the county and are thrown into gentle folds in 
the southern part. The ridges here, as in other portions of the State, 
are capped by sandstone or are made up entirely of sandstone, while 
the valleys are generally underlain by shales. 
Starting about 2 J miles west and a little north of Morrillton, the 
Morrillton anticlinal fold of the rocks runs due east to Cadron Creek, 
crossing that stream in sec. 8, T. 6 N., R. 14 W. The group of parallel 
ridges and valleys involved in this fold have a width of 3 miles in 
Conway County. The relations of these ridges to one another are not 
apparent to anyone passing across the county on the railway, because 
the railway does not cut across them, but follows the valleys, and is 
therefore parallel to the lines of structure. 
CLAY DEPOSITS. 
Varieties. — The principal clays of Conway County are of the follow- 
ing four varieties: 
1. The clay shales and the clays derived directly from them by 
disintegration. 
