Mineral assessment tracts in Linn county, Iowa

GP05: Mississippi Valley, S.E. Missouri Pb-Zn (32a) (Late Paleozoic) , covers 50 % of this area
90%50%10%5%1%
23368
LS01: Duluth Cu-Ni-PGE (5a) (Middle Proterozoic) , covers 43 % of this area
The number of undiscovered deposits in this tract was not estimated.
LS09: Mississippi Valley, S.E. Missouri Pb-Zn (32a) (Late Paleozoic) , covers 50 % of this area
90%50%10%5%1%
00012