OF ARKANSAS 



111 



s s 



I I I 



s s 



1 1 1 



s I s 



I ■ I 



s s 



I ■ ! 



s s 



I * I 



s s 



I ■ I 



s s 



I i I 



200? 



s s 



l ■ r 



s s 



I - 1 



s s 



- 



CII 



CH CH 

 CH 



CH CH 



L L 



40? 



40? 



35 



40? 



White, yellow and brown sandstones, some of 

 which have a cellular structure. 



Ferruginous and dark shales. 



Chert and cherty barren limestone. 



Black cherty shale. 



The first and highest 

 memberof this section — 

 the sandstone formation 

 — occupies the summit of 

 the ranges of hills adja- 

 cent to White river, 

 above and below the 

 mouth of Brush creek, 

 and will, doubtless, be 

 found capping many of 

 the isolated peaks, which 

 rise in various directions 

 out of the barrens and 

 prairies, on both sides of 

 the Missouri road lead- 

 ing to Springfield. The 

 second member underlies 

 more immediately those 

 south-east sections of 

 land, bordering on White 

 river, that are elevated 

 150 to 200 feet above that 

 stream, while the under- 

 lying chert and cherty 

 limestone form cliffs on 

 White river, near the 

 mouth of Brush creek, 

 and become the surface 

 rocks in the north-west 



part of the county, in consequence of the rise of the geological forma- 

 tions in that direction. 



This latter rock is, no doubt, for reasons already advanced in the pre- 

 ceding section, the source of the pieces of lead ore which, according to 

 the statements of many citizens, have been occasionally picked up in this 

 township and along some of those branches, forming the heads of the 

 Illinois river, which take their rise in the northern part of this count 

 This inference is further corroborated by the statement of William Ray, 

 that he had dug out a wagon-bed full of lead ore, somewhere in town- 

 ship 17 north, range 29 west, 6 to 8 miles north-east of Fayetteville. 



Three miles north-west from the mouth of Brush creek, considerable 



