1897.] 



ASHLEY — GEOLOGY OF ARKANSAS. 



269 



again in the same strike in 6 S., 24 W., section 2, where a small 

 drain crosses the township line, near the north and south half-mile 

 line of the section. This region between the Amity and Big Bear 

 anticlines has been very badly crushed in 5 S., 23 W., sections 31 

 to 33. Fig. 21 is an example of crushing in shale exposed in a 



Fig. 21. — Examples of crushed shale 

 in 5 S., 23 W., section t,^- 



creek bottom in section ^2>i northwest quarter. In the southwest 

 quarter of section t,^)^ ^^ ^^^^ junction of two small creeks, is a fault 

 with an offset in the outcrop of several yards, the sandstone layers 

 being sharply jammed together and the shales tightly squeezed. 

 Fifty yards from this point up the stream that enters from the west, 

 the way the shales are crowded upon the end of a hard layer of 



Stream 



Fig. 22. — Shale in the bed of a stream showing secondary 

 movement. 



sandstone suggests that the movement may have taken place since 

 the stream eroded away the part of the Imrd layer which is gone 

 (see Fig. 22). 



An Overturjt. — In 5 S., 22 W., section 32, near the northwest 

 corner are evidences (stronger in section 31, north of centre of 

 section) of an overturn. The overturn follows up a little creek, 



PROC. AMER. PHILOS. SOC. XXXYI. loO. S. PKI^•TED AUGUST 11, 1897. 



