268 



ASHLEY — GEOLOGY OF ARKANSAS. 



[May 13, 



across the fold. Exposures of igneous rocks are common in the 

 region of these small anticlines. 



Amity Anticline. — The Amity anticline is first noticed as a nose 

 on the Caddo in 5 S., 23 W., near the centre of section 24. By 

 means of a quartzite layer it was traced southwest into the novac- 

 ulite ridge just north of Amity. It makes a low rise, exposing 

 novaculite just east of the Amity-Hot Springs road in the southeast 

 quarter of section 27 ; it forms the low ridge, seven hundred yards 

 long, just north of Amity. This anticline can be traced by means 

 of the large novaculite blocks strewn on the ground for a quarter 



Fig. 20. — Faulted sandstones near Amity, Clark county (5 S., 23 W., section 

 30, S. E. quarter). 



of a mile west of the end of the ridge along the direction of the 

 strike. Where it crosses a small drain in section 33 the horizontal 

 outcrops of the rocks are sharply bent, without fracturing, through 

 an arc of 110°. In the northeast quarter of section 31, an anti- 

 cline in the same strike crosses a tributary of the north fork of An- 

 toine creek. It has not been distinguished further west. Near the 

 last mentioned exposure is a curious example of faulting of the 

 rocks; it is illustrated in Fig. 20. This fold is of interest as being 

 the most southern anticline to bring thick bedded novaculite to the 

 surface. The structure is overturned where the novaculite is ex- 

 posed. 



Minor Anticline. — In 5 S., 23 W., section 31, the southeast quar- 

 ter, the dips indicate the existence of ah anticline which is seen 



