296 RECORD OF DEEP- WELL DRILLING FOR 1905. 
Niagara — Continued. Feet. I 
Hard grayish and brownish cherty limestone; water stands within 26 feet 
of surface at 450 feet 410-450 
Very soft gray limestone 450-470 
Hard grayish and brownish limestone; water stands within 22 feet of sur- 
face at 505 feet 470-505 
Soft gray limestone 505-513 
Soft and very soft grayish limestone; hard stratum at 630 to 650 feet 513-735 
Hard gray limestone; water stands within 14 feet of surface 735-790 
Soft brownish and gray limestone 790-825 
Clinton: 
Very soft dark-red ferruginous shale 825-880 
Maquoketa : 
Very soft gray limy shale 880-986-. 
Rig used, pole tools. Diameter of well, 10 inches from surface to 150 feet; 7 inches 
from 150 to 400 feet. Casing used, 113 feet. Well yields by pumping 350 gallons per 
minute. 
