280 ASHLEY — GEOLOGY OF ARKANSAS. [May 13, 



27 W., the end of Line Mountain crosses sections t and 2, and 

 Raven mountain, with a south of west strike, enters sections 4 and 5. 

 Between sections 5 and 6 it is cut by the Little Missouri river, the 

 anticlinal structure showing^ distinctly. West of the Little Missouri 

 it strikes a little north ot west, and under the name of Prairie 

 mountain crosses the northeastern section of 5 S., 28 W., gradually 

 entering 4 S., 28 W. It is crossed by the Saline at Moore's mill, 

 in section 31, and it comes to an end a mile or two further west. 



In 5 S., 31 W., a novaculite ridge, called the Cross mountain, 

 rises in section 2 and runs out at the Line road in 5 S., 32 W., in 

 the northern part of section i. 



^^ 5 S., 32 W., the southern part of section i, are two short 

 novaculite ridges in the same strike. The Line road passes between 

 the two through what is known as ''the gap." In the southeast 

 corner of section 2 another ridge rises and runs west to the gap at 

 the head of West creek, in the southwest quarter of section 3. 

 West of this gap it rises to a height of 450 feet, and is known as 

 Potato hill, then it runs a little south of west and passes out of the 

 State at section 7. Between sections 11 and 14 the South moun- 

 tain begins, strikes west for two miles, where it is cut by the head 

 waters of Cross creek, then runs south of west and passes out of 

 the State in section 18. These ridges continue west into the 

 Indian Territory, but how far and how important they become 

 is not known. 



BalV s Branch Anticline. — Ball's Branch anticline is crossed by 

 the Saline river in 5 S., 28 W., section 6, near the centre of the 

 section.^ In 5 S., 29 W., this same anticline passes through sec- 

 tions I and 2, crosses Harris Fork in section 2, northwest quarter. 

 Though the anticline was not found to the west, ridges which occur 

 in its strike suggest that it, at least, continues across the northern 

 edge of 5 S., 29 W. 



In 5 S., 30 W., the Cossatot crosses an overturn near the north 

 section line of section 6. 



The Watkins' Mill Overtwned Anticline. — The Watkins' mill 

 fold is a simple anticline where crossed by the Saline in 5 S., 



28 W., section 5, on the south section line. 



Where it is crossed by Harris Fork at Watkins' mill, in 5 S., 



1 Practically all the structure of ranges 28 and 29 W. was worked out by Prof. 

 A. H. Purdue, Professor of Geology at the Arkansas Industrial University, for- 

 merly assistant on the Geological Survey. 



