292 ASHLEY — GEOLOGY OF ARKANSAS. [May 13, 



Holly creek to the Saline river it forms a high pointed ridge from 

 two hundred to three hundred feet in height, the anticlinal struc- 

 ture showing in several places. At the Saline it is overturned, and 

 where the axis crosses the river in 7 S., 29 W., section 21, north- 

 east of southwest, there is a small cave known as Arsenic cave. 

 Though the overturning does not show quite as plainly at the cave 

 as in several places, this was the only point at which a photograph 

 was obtained of the fold. Fig. 32 is a drawing from a photograph. 

 This axis could not be followed west of the Saline, but it may have 

 some connection with an anticline crossed by the Cossatot in 7 S., 

 30 W., section ;^^, in the northwest of the southwest quarter. 



Another axis appears to run parallel to the Arsenic cave anticline 

 but one-half mile south of it. This southern axis was found at 

 three places. In 7 S., 20 W., it is crossed by the Muddy Fork in 

 section 12, where it turns to the northeast, and by Holly creek in 

 section 16, northeast quarter. No trace of it could be found on 

 the Saline river. In 7 S., 30 W., it is crossed by the Cossatot in 

 section 33 at the township line. 



Other A7iticlines. — In townships 7 and 8 S., 25 to 27 W., the 

 structure is much obscured by the over-lying water-worn material and 

 Cretaceous. An anticline is reported by Dr. Brannerand Dr. Hay^ 

 as cut by Holly creek in 7 S., 28 W., section 28, northwest 

 quarter. 



Several minor anticlines show in the banks of the Cassatot in 

 8 S., 30 W., section 4. as shown in the Cassatot section, PI. ii. 



Red Bluff Anticline. — In 7 S., 25 W., a high ridge with a south 

 of west strike makes what is known as Red Bluff where cut by the 

 Little Missouri river in section 6, southwest quarter. The structure 

 appears to be an overturned anticline with south dips. Following 

 this strike in 7 S., 26 W., the dips give an anticline in section 8. 



The Wall mountain anticline is shown by the topography to be 

 continued across the northern row of sections of 7 S., 25 W., and 

 south of Cow creek, but its extent to the west is unknown. 



The Muddy Fork Overturn. — In 7 S., 25 W., section ro, north- 

 east quarter, Prairie creek crosses what appears to be an overturned 

 anticline with south dip. The topography strengthens this view. 

 A high ridge which starts abruptly in section 12 crosses Prairie 

 creek at this point and runs a little south of west to the Little 



^ Geol. Surv. of Ark., An. Kep. for 1888, VoL ii, p. 286. 



