1897.] ASHLEY — GE'jLOaV OF ARKANSAS. 235 



io° to 15°, until shales are met with in the flats at the Bellah mine. 

 Only one important break occurs, where the valley of Rabbit creek 

 comes in. At this point may be a heavy bed of shale, and shale 

 may exist at other points along the section, but was not seen. 



From 1500 to 2000 feet of sandstone are omitted from the top of 

 this section. The existence of faults is quite possible, but no evi- 

 dence of any was found. 



The position in which this section is placed relatively to the 

 others is based upon the occurrence, in the strike of these shales 

 and six miles to the east, of the thin beds of novaculites and shales 

 which are known to be not far above the principal bed of novacu- 

 lite. 



Section II. — Section ii shows the order of rocks on Cossatot 

 river at the gap near Pontiac post-office. The ridge crossing the 

 Cossatot just north of Pontiac has black novaculite exposed at the 

 centre oi an anticline. The section starts from the exposure of nova- 

 culite in the gap, and runs south to where the river turns northwest 

 half a mile below. The sandstone overlying the novaculite is 

 poorly exposed on the south side of the anticline, but shows on the 

 north* side, and also on the south side of the ridge, east of the 

 river. A careful section was made at this place, but as the shales 

 and sandstones at many points in it are crushed together and 

 broken, suggesting faults, the section is not altogether trust- 

 worthy. Omitting minor details the section is as follows : 



FEET. 



Sandstone 150 



Concealed 150 



Heavily bedded sandstone with thin beds of shale 375 



Shale with occasional beds of sandstone 325 



Concealed 225 



Shale and sandstone much crushed 175 



Sandstone in thin beds 1 75 



Shale and sandstone layers 50 



Sandstone 25 



Sandstone and quartzite 35°— 



Black novaculite base 



Total 2000 



