266 



ASHLEY — GEOLOGY OF ARKANSAS. 



[May 13, 



axis.^ The axis is crossed by the Caddo again in section i6 near 

 the mouth of Caney Fork. It forms a fifty-foot ridge running 

 along the south side of the Caddo. In section 1 6 it is crossed by 

 the river again just south of where it turns east, and again a quarter 

 of a mile further west in section 17. In 5 S., 24 W., there is an 

 overturn in the northern part of section 24 showing poorly on and 

 near the Amity-Rock creek road. This may be a continuation of 

 the preceding, and if it is, it is probable that this anticline may 

 be considered as running up the Rock creek valley near the middle 

 east and west section line of the township. It is the determining 

 factor in the structure of the northern part of Pine mountain. 



Fig. 18. — Contorted sandstone, shale, and novaculite exposed on the Caddo; 

 100 feet wide by 50 feet high. 



In 5 S., 23 W., the northwest corner of section 21, on the Caddo, 

 is one of the best exposures of the thin bedded novaculite and si- 

 licious shales and in the shales, on either side are good examples of 

 contorted strata. Fig. 18 shows the wrinkling of these beds. 

 There is also here a small but good example of a reversed fault 

 having a throw of two and one-half feet. 



Sugar Loaf Mountain Anticline. — In 5 S., 23 W., the northeast 



1 Photographs were obtained of many of the more interesting structural fea- 

 tures of the region, but through an accident nearly three dozen of the best nega- 

 tives were destroyed when it was too late to replace them. 



