1897.] ASHLEY — GEOLOGY OF AKKANSAS. 273 



Minor anticlines occur in the same township southeast quarter of 

 section 8 and north half of section 17. Their extent is unknown. 



Antoine Mountam Anticline. — Questionable traces of the An- 

 toine mountain anticline appear in 6 S., 23 W., near the centre of 

 section 22. In section 19, it forms a ridge extending westward into 

 6 S., 24 W., through the south half of sections 23 and 24, and probably 

 forms the ridge across the township along the south side of Wood- 

 all's creek. The main ridge is two hundred to three hundred feet 

 high, and is chiefly interesting on account of the anticlinal wall on 

 its summit. This (see Figs. 25 and 26) is a low irregular wall 

 about a quarter of a mile long, from the side resembling an old, 

 ruined fortress. It varies in height and thickness. On the north 

 side it is in places 15 to 20 feet high; on the south side it is fre- 

 quently 40 feet high, and in thickness it varies from a wall from 

 3 to 6 feet thick to a mound-shaped pile of stones. The layers 

 are not continuous, but the break is not due to faulting. The 

 wall is composed of a pile of lenticular rock masses suggesting 

 that while being bent the layers give way in small blocks, and 

 these, under great pressure or tension, have elongated and assumed 

 the shape and position as shown, and have been left behind by ero- 

 sion. The theoretical consideration of thfs is taken up in VIII. 

 The rock at this point is a firm white standstone showing little or 

 no signs of metamorphism. 



Minor anticlines. — There are two anticlines in 6 S., 24 W. One 

 first noted in section 24, southwest quarter, was traced a little south 

 of west to the centre of section 27. It makes a one hundred foot 

 ridge and probably continues in the same course westward. The 

 other one forms the low ridge just north of Caney Fork post-office, 

 running from the centre of section 26 through the south half of 

 section 27, and probably continues westward. Judging from the 

 fact that traces of manganese show at the top of the last-mentioned 

 ridge, the heavy novaculites, or the horizon at which they occur, 

 cannot be far below the surface. 



The Region of the Overwash. 



As only four of the anticlines in the region of the overwash 

 were definitely found at more than one locality, those four will be 

 spoken of first. 



The Mill Creek Anticline. — In 7 S., 21 W., northwest quarter of 

 section 24, on Mill creek, an anticline is reported by Dr. O. P. 



