OF ARKANSAS. 



03 



SECTION OF BOAT MOUNTAIN— Continued. 



* I 









4) 



310 



Coarse-textured, and subcrystalline mem- 

 bers of the subcarboniferous 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- 



