lines.] DETAILED RECORDS. 88 
Feet. 
Sandstone; water 355- 375 
Shale 375- 385 
Pink shale 385- 400 
Gravel ; water 400- 405 
Gray shale. 405- 410 
Red shale 410- 430 
Gray limestone; water between 430 and 435 430- 450 
Gray shale 450- 47(1 
Gray limestone; water between 470 and 475 470- 480 
Shale 480- 490 
imestone 490- 505 
Sandstone 505- 510 
Shale 510- 525 
Sandstone; water 525- 535 
Limestone; water rose 30 feet from crevice in rock between 725 and 
735 feet 535- 965 
Shale 965-1 , 015 
Sandstone; at 1,075 feet water rose 970 feet 1, 015-1, 095 
Shale 1 , 095-1 , 1 00 
gypsum 1, 100-1 , 120 
Diameter of well, 12 and 9 inches; 6-inch pump casing 500 feet down. Depth of 
>rincipal source of water, 1,120 feet. Water rises to within 206 feet of mouth of well. 
field, 100,000 gallons in twenty-four hours. 
70. Well at Burlington, Des Moines County, Iowa. 
[Bejun August 22, 1904; completed October 12, 1904. Authority, R. J. Johnston, driller.] 
Feet. 
rtificial filling 0-10 
ellow clay 10-20 
lue clay 20-60 
and 60- 66 
lue clay 66-72 
ft limestone 72- 75 
)ft gray shale 75- 85 
ft blue shale 85-154 
ft black shale 154-160 
ray shale 160-190 
)ft dark shale 190-260 
)ft gray shale 260-280 
ard blue limestone 280-305 
ard gray limestone 305-325 
ft gray shale (limestone) 325-335 
ard gray limestone 335-355 
ard red ' ' granite ' ' ( limestone containing py rite ) 355-400 
ft blue limestone 400-410 
ft red limestone 410-425 
hite "magnesia" (elayey limestone) 425-435 
ft ' ' water rock ' ' (no samples below 430) 435-507 
Rig used, Keystone driller. Diameter, 5| inches from to 507 feet. Length of 
ling, 76 feet. Main water supply from 435 to 507 feet. Flows 45 gallons per 
nute. Pressure, 16J pounds. 
