350 COUNTY AND KEGIONAL GEOLOGY. 



A short distance below this place, a quarry has been 

 opened in some strata of hard, bluish, impure limestone that 

 seems to belong beneath those of the foregoing section, but 

 their actual relative position was not satisfactorily ascer- 

 tained. Near this point a shaft of several feet in depth 

 has been sunk with the hope of finding another bed of 

 coal. It was reported that such a discovery had actually 

 been made there, but no reliable account of the digging could 

 be obtained, nor any evidence that any trace of coal had 

 been found beneath the bed so well known. 



Going southward about four miles from Clarinda upon the 

 west side of the valley, the same bed of coal and its asso- 

 ciated strata are again exposed in the banks of a small creek 

 Fig. 31. just before it empties into the Nodaway. 



■r^§353ill£) , The coal is mined there also upon land 

 of Judge Kibble, and the following sec- 



* p~i» ^zrt^Z 3 Z~ r Ll z ' 6 ''.. tion, illustrated by Fig. 31, was 



ZW gjIIMH B K 6 " measured there: 



Section at nibble's Coal-bank. 



No. 5. Yellowish, shaly, calcareous clay 7 feet. 



No. 4. Hard, heavy bedded limestone 2% feet. 



No. 3. Bluish, clayey shale 2^ feet. 



No. 2. Coal IK feet. 



No. 1. Light, bluish, fossiliferous shaly clay , 1 foot. 



Total 14K feet. 



Proceeding down the valley of the Nodaway, we find a very 



interesting exposure of strata in the right bank of the stream, 



Fig. 32. just below the dam at Brady's 



^/^gJll SiEl r //mill. The locality is very near 



g jg^ ^jJlB r the south boundary of the State, 



* ^^^'ZZTzH^ ^ 'f" and the exposure is represented 



e y ^^^f^ EE 77 = ~j^ = f^ \ \ „ by the following section, and 



t l^^^^^=fi^^^W Fig. 32. 



Section at Brady s Mill. 



No. 7. Yellowish, shaly marl, with occasional thin layers of 



impure limestone 5^ foet. 



