L<-97.] 



ASHLEY — GEOLOGY OF ARKANSAS. 



283 



gest its existence parallel to, and a little over a quarter of a mile 

 south of, the last-described axis. In 5 S., 29 W., it forms the val- 

 ley of Mill-site branch through sections 23 and 22. At the mouth 

 of the creek a small fall in Harris creek offers some water power. 

 North and south of the Mill-site branch valley are high ridges, 

 the southernmost one being synclinal in structure. From Harris 

 Fork to the Cossatot in 5 S., 30 W., section 21, northwest quarter, 

 the continuity of the structure is clearly defined by the long ridge 

 north of the Harris Fork valley and ridges between Baker creek 

 and the Cossatot in 5 S., 30 W. Mr. Means crossed the anticline 

 in the northwest quarter of section 20, but it was not found further 

 west in 5 S., 31 and 32 W. To the east of the Little Missouri no 

 anticlines were found in this strike, but the topography of the Pine 

 mountain in 5 S., 26 W., in section 15, south of Lodi post-office, 

 gives every evidence of being an anticline, probably an overturn. 



The ridge, which, for the most of its length, is not conspicuous, 

 here becomes one hundred and fifty feet high, and this anticline 

 again may be in the same axis as the overturn south of Rock creek 

 post-office. 



Blocker Branch A7iticline. — Corresponding in strike with the 

 overturn in the south part of Pine mountain in 5 S., 24 W., as car- 

 ried out by the topography, is an overturn on the Little Missouri 

 river in 5 S., 27 W., sections 21-23. This overturn is visible at 

 a number of places along the river, the bending showing nicely at 

 the foot of the road just north of Mr. Logan's, north of the centre 

 of section 22. This fold is remarkable for the low dip on the south 

 side. 



Fig. 30. — North-south section along the Little Missouri river. 



The exposure as given in Fig. 30 is two miles long. Pine moun- 

 tain, shown in this section, is an abrupt ridge on the northern edge 

 of sections 26 and 27 over two hundred feet high, though it main- 

 tains this height for only a mile or two to the west. There is probably 

 a fault just north of this ridge, as seen in the section in Fig. 30. 



West of the Little Missouri the course of the anticline is shown 

 by the low ridge north of Blocker branch. But it could not be 



