IOWA ACADEMY OF SCIENCE 
197 
TABLE III. 
From Clinton West, Sixth Tier of Counties. 
Stratum. 
Depth. 
Solids. 
Clinton 
1065 
400 
Tipton 
B. S 
2696 
330 
Amana 
1640 
1033 
Homestead 
2224 
1239 
Grinnell 
2002 870 to 1500 
Des Moines 
3000 
2910 
Dunlap 
St. Peter (?) 
1535 
1385 
TABLE IV. 
Lansing to 
Keokuk, on or Near the 
Mississippi River. 
Stratum. 
Depth. 
Solids. 
Lansing 
668 
451 
McGregor 
Basal S. S 
520 
488 
Monona 
420 
421 
Manchester 
1870 
494 
Dubuque '. . . 
900-1300 
270 
Monticello 
1198 
408 
Sabula 
973 
298 
Clinton 
1065 
400 
Wilton . . . .’ 
1360 
1146 
Davenport 
St. P. to B. S 
........800-2100 
1066 
Burlington 
2430 
1082 
Ft. Madison 
680 
1970 
Keokuk 
767 
3600 
TABLE V. 
South from Calmar, Winneshiek County, to Centerville. 
Stratum. Depth. 
Calmar Jordan 1740 
Oelwein 1000 
Vinton N. Richmond 1402 
Amana Jordan (?) 1640 
Homestead Basal S. S 2224 
Washington 1617 
Ottumwa L. Oneota 2200 
Centerville L. Oneota 2495 
TABLE VI. 
From Mason City to Des Moines. 
Solids. 
306 
395 
558 
1033 
1239 
1630 
1155 
1746 
Stratum. 
Depth. 
Solids. 
Mason City 
1277 
350 
Hampton 
1708 
395 
Ackley 
2032 
604 
Nevada 
980 
2280 
Des Moines 
3000 
2910 
