OF THE NORTHWEST. 43 



naked wall, as seen in the foreground of the view, taken in a cove not far from the 

 mouth of the Kickapoo. 



OUTCROP OF LOWER SANDSTONE, KICKAPOO. 



Travelling still further north, or northeast, only thin beds of magnesian limestone 

 surmount the hills, alternating with sandstone, as in Township 9 north, Range 5 

 west, of the 4th Principal Meridian, about ten miles above the mouth of Plum 

 Creek, where the hills present the outline here presented. 



ALTERNATIONS OF MAGNESIAN LIMESTONE AND SANDSTONE, KICKAPOO. 



Six or seven miles northeast of the above locality, in Township 10 north, Range 

 4 west, of the 4th Principal Meridian, the sandstone extends even to the tops of 

 the hills, without any capping of magnesian limestone. 



This change in the succession of the strata is caused by the northerly rise of the 

 rocks, and their southerly dip. 



But, though the general tendency of the stratification is to rise towards the 

 north, or rather northeast, it is not uniformly so ; there are, in fact, local pitches of 



