OF ARKANSAS. 
93 
SECTION OF BOAT MOUNTAIN—Contrnvep. 
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Ce aT: 
{ Inches. 
Coarse-textured, and subcrystalline mem- 
bers of the subearboniferous group ; three 
hundred and ten feet in thickness. 
many instances, conglo- 
merate sandstone has 
been found, either in 
place, or in loose blocks 
on the-slopes and at the 
foot of the mountains; 
detached masses have, 
evidently, rolled either 
from the summit of the 
adjacent hills, or, at 
least, from elevated po- 
sitions on their flanks. 
The black slate is, per- 
haps, not everywhere 
present as an important 
member of the subcar- 
boniferous group, since 
it has not everywhere 
been found at the base 
of these hills; but, being 
prone to crumble to clay, 
and being, no doubt, 
- sometimes locally reduc- 
ed in thickness to a few 
feet, it is then, generally, 
completely concealed by 
debris, and thus fre- 
quently overlooked. 
The scenery in Carroll 
county, in the vicinity of 
the Boat mountain, as 
shown in the wood-cut 
No. 12, of Marshall’s— 
prairie, has much of the 
same character as the 
prairie landscapes in 
Wisconsin and Iowa. It 
is, decidedly, a fine agri- 
cultural district. The 
distant hills, and the roll- 
