290 



ASHLEY — GEOLOGY OF AKKAXSAS. 



[May 13, 



Minor Anticlines. — In 7 S., 30 W., section 6, northwest quarter, 

 a single exposure indicating an anticline was found on the Cassatot. 

 In 7 S., 31 W., the Cossatot crosses two anticlines in section 12, 

 one in the northeast of the northeast, and another in the northeast 

 of the southeast. In 7 S., 32 W., the Rolling Fork crosses an anti- 

 cline in the southwest quarter of section 15, near the mouth of 

 Davis branch. It also appears to cross an overturn with north dips 

 in section 16 east of the centre. 



Cave Creek Anticlinal Axis. — In 7 S., 29 W., section 9, near 

 the mouth of Cave creek, the Saline river crosses the Cave creek 

 anticline. Going west it forms an unusually straight valley running 

 a little south of west, down which Cave creek flows. This valley 

 is continuous from the Saline to the Cossatot, but near the Cossa- 

 tot it is deflected to the south, the axis appearing to be in a sharp 

 ridge in 7 S., 30 W., the northwest quarter of section 20. This 

 ridge ends abruptly in the northeast of section 20. In 7 S., 31 W., 

 it forms the valley of a tributary of Stowe's creek, running through 

 sections 22 and 23. It is here indicated only by the parallel out- 

 crops of thin novaculite and siliceous shale. Through sections 19, 

 20 and 21 the axis is followed by Bellah creek, forming a broad 

 valley to the Rolling Fork in 7 S., 32 W., section 27. The shales 

 form bottoms on the Rolling Fork. 



On the Saline river in 7 S., 29 W., section 16, its structure is 

 that of a simple anticline. To the west, its structure could not 

 be determined, but on Rolling Fork in 7 S., 32 W., low south dips 

 of 10° to 15° point to a monoclinal structure. Fig. 31 shows the 

 composite section exposed along the Rolling Fork. 



Bellah Cr. 



Fig. 31. — Section on Rolling Fork of Little river from Bellah creek southward. 



The Blue Ridge Anticline — The topography strongly suggest that 

 the Blue Ridge anticline is a continuation of the '* Chimney Rock " 

 axis which runs west through the Jenkins' spring ridge. Jenkins' 

 spring ridge runs a little south of west to Fallen creek, and is cut 

 by two creeks. At Fallen creek it is questionably anticlinal. 



