The Chouteau Group — Eowleij. 
117 
THE ARTESIAN WELL AT CITY PARK, 
IOWA. 
DAVENPORT. 
By a. S. Tifka.ny. 
This well is situated 1()0 feet abovR low water in the Missis- 
sippi, and 688 feet above the sea. 
Drift 100 feet 
Coal Measures 
30 feet. 
Corniferous 
390 feet. 
Lower Helder 
berg, 80 feet. 
Niagara 
175 feet. 
Cincinnati and 
Trenton, 
300 feet. 
Calclferous 
group 
Magnesian 
limestone of 
tlie Mo. reports 
512 feet. 
1.- 
2.- 
3. 
l.- 
5- 
6. 
7.— 
-Loess 40 feet; Boulder clay ()() feet 100 
-Dark clay shale 3() 
iTard drab limestone 220 
-Cream-colored limestone 30 
Hard, porous limestone, buff 20 
-Drab limestone, hard 90 
Very dark blue calcareous shale 30 
-Soft, buff limestone, Le Claire 80 
-Hard, rough, drab limestone 50 
75 
50 
125 
50 
75 
50 
10 
!)0 
15 
-Drab limestone 
-Hard shaly limestone 
-Dark gray limesto e 
-Dark drab limest>ne 
-Soft white limestone 
-Soft white limestone 
-Blue clay shale, with silica 
-St. Peter sandstone, white 
-Arenaceous shale, drab, blue and red . . . 
-Magnesian limestone, with ten per cent, 
silica; cement i-ock 
-No record 
-Sandstone, (by City engineer) 
-Limestone, (borings washed away) 
-Limestone 
210 
25 
10 
100 
130 
350 
380 
400 
490 
520 
600 
650 
725 
775 
900 
950 
1,025 
1,075 
1,085 
1,175 
1,190 
1,400 
1,797 
Notp:. — No. 4 contained fossils, vi/: Paracyclas tenuis Hall, 
Phitystoma turblnatus Hall, (yvrtina hamiltonensis Hall, Clado- 
pora and Pleurotomaria, undetermined; No. 7, contained Panta- 
nierella arata Con. or P. pupilionensis Hall. 
It appears that 80 feet or more were eroded from the Cor- 
niferous before the coal shales were deposited. The upper 80 
feet of the Corniferous at this place have well marked litho- 
logleal features, which could be readily recognized in the 
