OF ARKANSAS. 43 



an average of a large proportion of that part of Izard county, lying north- 

 east of White river, and between that stream and Strawberry river. 



Between Calico and the North Fork, the white and yellow sandstone 

 occupies, for the first 8 miles, a position towards the summits of the ridges. 

 Its upper layers arc generally coarse-grained, and present glistening 

 reflections. This sandstone is underlaid by the cherty limestones which 

 form the varigated cliffs on White river, known by the name of the "Calico 

 Rock." [See plate No. 2.] 



Six miles from Calico, on the road from Calico to the North Fork, the 

 plateau of sandstone, from which sketch No. 1 was taken, is at an eleva- 

 tion of 380 to 390 feet above White river. 



At the widow Lafferty's farm, where a soil was collected from Izard 

 county, for chemical analysis, the sandstone is overlaid by limestone. 



In the vicinity of Friend's creek, the sandstone becomes harder and 

 more charty; it may be designated there, a porous and cellular, cherty 

 sandstone. 



In passing over the ridges about Friend's creek, a high knob is seen off 

 towards the south, known by the name of " Naked Joe." This hill ap- 

 pears to be some 150 to 200 feet higher than the main ridges of the country, 

 and formed a conspicuous land-mark, in early times, for the guidance of 

 hunters and explorers. 



The country around Friend's creek, where there is so much cellular 

 chert on the surface of the ground, has much the aspect of the iron region 

 of south-western Kentucky, and though no body of iron ore has yet been 

 discovered on the waters of this stream, the detailed survey may, perhaps, 

 hereafter develop such. 



Four miles before reaching the North Fork, the ridges at the same ele- 

 vation (i.e., 380 to 390 feet) as the sandstone platform, 6 miles from Calico, 

 are composed of cellular buhrstone chert. 



The summit level, passed over about 3 miles before reaching the North 

 Fork, and where the descent to that stream commences, is about 445 feet 

 above Major Jacob W r olf's house, and 537 feet above the North Fork, ac- 

 cording to observations taken with the aneroid barometer. 



Beyond the North Fork, there is another high conspicuous hill, towering 

 above the rest of the main ridges, called " Mattener's Knob," which I was 

 told by Maj. Jacob Wolf, was reported by surveyor Smith, to be 1,100 feet 

 high. 



Maj. Jacob W T olf reports a small piece of ore, found in digging the 

 foundation of a mill, near the North Fork, which was pronounced to be 

 silver ore by some one, who professed to have examined it, but whose 

 name I did not learn. I have little faith in silver occurring in the forma- 

 tions which prevail along the North Fork, towards its confluence with 



