364 



COUNTY AND REGIONAL GEOLOGY. 



coal-measures. The principal exposures of strata occur in 

 the valley of the East Mshnabotany, but a few are found in 

 the valley of the Nodaway in the northwestern part of the 

 county, and also in the valley of the Tarkeo, in the southern 

 part. • 



The following section, illustrated by Fig. 36, was measured 

 at and near Stennett's quarries, near the mouth of Pilot 

 creek, on the east side of the valley of the Mshnabotany, 

 and six miles north of the village of Red Oak. It is the 

 most extensive exposure of strata to be found in the county. 



Fig. 36. 





s / 



Section at Stennetfs Quarries. 



No. 10. Coarse, ferruginous sandstone 20 feet. 



No. 9. Unexposed 4 feet. 



No. 8. B'ack, fissile, carbonaceous shale ■ 23^ feet. 



No. 7. Fragmentary, marly limestone 5 feet. 



No. 6. Compact, gray limestone 2 feet. 



No. 5. Grayish, marly clay 2 feet. 



No. 4. Compact, gray limestone 2% feet. 



No. 3. Grayish, calcareous clay 4 feet. 



No. 2. Compact, gray limestone, with dark nodules of flint 3^ feet. 



No. 1. Unexposed from the bed of the creek 7 feet. 



Total 52>£ feet. 



