326 
IOWA CAMBRIC SUCCESSION 
deposition of the Peter Sandstone. Elsewhere in Wisconsin it is 
known as the Willow River Sandstone.®* 
With the Iowa section the correlations of Cambric terranes of 
neighboring states are indicated in the subjoined table. 
Correlation of Iowa Cambric Terranes 
Iowa 
Minnesota 
Wisconsin 
Peter sandstone 
(Ordovicic) 
Peter sandstone 
Peter sandstone 
Interval 
Shakopee dolomite 
Jordan sandstone 
Oneota dolomite 
Waukon sandstone 
Interval 
Allamakee dolomite 
Interval 
Albin shales 
Interval 
Dresbach sandstone 
Eau Clare shales 
Simon sandstone 
Hinckley sandstones 
Interval 
Pre-Cambrian complex 
Shakopee dolomite 
Jordan (original) 
St. Lawrence (part) 
Jordan (part) 
(Wanting) 
Franconia shales 
Dresbach sandstone 
St. Croix (part) 
Hinckley sandstones 
Shakopee dolomite 
New Richmond S. 
Oneota dolomite 
Jordan (part) 
St. Lawrence dol. 
Franconia shales 
Dresbach sandstone 
Eau Clare shales 
Simon sandstone 
Hinckley sandstones 
64 Geol. Surv. Wisconsin, Vol. IV, p. 106, 1882. 
