OF ARKANSAS. Q3 



in the adjacent hills, instead of prospecting, as he did, over the platform 

 of sandstone which forms the base of the bluffs on this part of the Buffalo 

 fork of White river, as will appear from the two following sections taken 

 near the mouth of Cave creek : 



Heights above the Buffalo fork of White river. 



545. Top of chert slope. 



500. Slope with chert. 



440. Loose grey chert in continuation of slope. 



430. Reddish grey sandstone. 



415. Reddish sandstone with chert segregations. 



400. Reddish sandstone with stalactitic structure. 



370. Chert masses. 



335. Bench of yellowish-white sandstone. 



300. Rolled blocks of sandstone under the above bench. 



270. Obscure ledges of sandstone. 



255. Hard grey siliceous sandstone. 



250. " " « « 



20 °- " " " " in loose blocks in slope. 



130. Hard grey sandstone. 



90. Hard, white quartzose sandstone, rusty in the joints, but white inter- 

 nally in the substance of the mass. 

 50. Hard, white, quartzose sandstone. 

 25. " " « « 



15. " " " « 



6. Grey siliceous (?) limestone. 



1. Hard, white, quartzose sandstone, possessing a sub-oolitic structure. 

 In this section very little limestone appears, though some ledges may be 

 concealed in the slope, since about half a mile north-west of the mouth 

 of Cave creek, the following section was obtained above the main plat- 

 form of hard, quartzose sandstone, which forms an escarpment on the 

 north side of Buffalo : 



340. Slope with chert masses of 40 feet. 



200. Bench of brown, ferruginous sandstone. 



290. Encrinital chert and sandstone. 



270. Bench of white sandstone 6 feet exposed. 



250. Slope with chert. 



235. Reddish grey siliceous limestone. 



215. Grey. " « 



180. Checkered calcareous sandstone. 



