1897.] ASHLEY — GEOLOGY OF ARKANSAS. 285 



Saline river in section 28, northwest quarter, a quarter of a mile 

 south of the Harris Fork axis. At the same distance south of the 

 Harris Fork axis, where it is crossed by the Cossatot in 5 S., 30 W. , 

 is an anticline corresponding to the one exposed on the Saline. 



In 5 S., 32 W., a small anticline is exposed on the Rolling fork 

 in section 25, a little scuth of the centre of the section, and a quar- 

 ter of a mile further south another one is crossed by the same stream. 

 In the strike of these two anticlines, two anticlines are crossed by 

 Cross creek in section 29, southwest quarter. They may therefore 

 be considered as on the same axis. 



Umpire Anticlinal Axis. — In 5 S., 28 W., the Umpire anticline 

 forms a ridge in the northern part of sections 34 and 33, and is 

 crossed by the Saline in the northwest of the northwest of section 

 TyTy. Further west in section 31 it is crossed by a small stream in 

 the southwest of the northeast, near an old mill. In 5 S., 29 W., 

 it is indicated by the dip in section 35. 



In 5 S., 30 W., it is crossed by the Cossatot in the centre of the 

 northwest quarter of section T^d. In 5 S., 32 W., section 32, south- 

 west of northwest, an anticline is crossed by Cross creek. Though 

 in the same strike this can hardly be assumed to be a continuation 

 of the anticline further east. 



Possum Creek Anticline. — In 5 S., 29 W., an anticline runs 

 close to the south township line. In 5 S., 30 W., sections 35 and 

 36, the Cossatot crosses the same anticline near the south township 

 line. The topography, which east of the Cossatot is a valley, to 

 the west becomes a prominent ridge. It runs west along the town- 

 ship line south of Possum creek and is found to be an anticline 

 where crossed by the Rolling Fork just south of the township line, 

 in 6 S., 32 W., section 2, at the ford of the Eagletown road. 

 Igneous rock is exposed in the axis at the last named place. There 

 is an anticline crossed by Possum creek in 5 S., 31 W., section 35, 

 northwest of southeast, but the topography shows that it cannot be 

 on this axis. 



Other Anticlines. — In the Carboniferous portion of 5 S., 25 and 

 26 W., the structure is but little exposed. The streams seldom 

 have deep channels and the dips found are universally south, except 

 for a quarter of a mile along Bear creek in 5 S., 25 W., section 34, 

 northwest of northwest. This last mentioned dip discloses the only 

 anticline definitely known in the township, though in some places 

 the bending of the rock suggests overturns. Slickensides abound 



PROC. AMER. PHILOS. SOC. XXXVI. 155. T. PRINTED AUGUST 12, 1897. 



