278 ASHLEY — GEOLOGY OF ARKANSAS. [May 13, 



Mr. Means also reports an anticline or overturn on Brushy Fork 

 in 4 S., 30 W., section 17, northwest quarter. 



Barn Creek Anticline. — Raspberry mountain is a novaculite 

 ridge crossing 4 S., 29 W., near the centre, and reaching the Cos- 

 satot in 4 S., 30 W., section 14, southeast quarter. Following 

 this strike there is an anticline in sections 17 and 18, south part, 

 which Brushy Fork crosses three times with an S-shaped curve, and 

 in the southwest quarter of section 18 it is crossed by Rock 

 creek. 



Further west it is followed by Barn creek, and shows as an anti- 

 cline near where the Old Line road crosses Barn creek in 4 S., 32 

 W., section 13. 



To the west Mr. Means found this axis to be replaced by one a 

 quarter of a mile further south. Barn creek swings south and fol- 

 lows the last axis quite closely across 4 S., 32 W. 



Pontiac Anticline. — The end of a long novaculite ridge crosses 

 the Cossatot in 4 S., 30 W., northwest quarter of section 22, just 

 north of Pontiac post-office. It runs out as a ridge a mile to 

 the west where it has a strike a little south of west. In this strike, 

 in section 20, the northwest quarter, an anticline is crossed by 

 Brushy Fork. . 



West of this point no anticline was found until 4 S., 32 W., sec- 

 tion 19, where Mr. Means reports an anticline crossing Hickory 

 creek near its junction with Buff'alo creek. 



Anticlines on the Cossatot. — In 4 S., 30 W., two small anticlines 

 are crossed by the Brushy Fork in section 20, one near the north 

 section line and the other a little more than a quarter of a mile 

 further south. 



About a quarter of a mile from the south side of section 20 

 (4 S., 30 W.), Brushy Fork and the Cossatot are separated by a 

 high but narrow neck of land, ten to twenty yards wide. They 

 diverge, however, and flow together a mile further down. On the 

 Cossatot side of this neck is exposed the fault shown in PI. VIII. 



This same fault shows again in section 21 at the first bend in the 

 Cossatot south of Pontiac post-office. It is really a double fault, 

 as shown in the Cossatot section on PL I. 



In the same township, section 30, near the half-mile line, the 

 Cossatot crosses an overturned anticline. A quarter of a mile 

 below, in the southwest quarter of section 29, the Cossatot crosses 

 another anticline, and near the south section line of section 29, it 



