1. Mineral Resources
2. Online Spatial Data
3. National Mineral Resource Assessment 1998

Mineral assessment tracts in Tama county, Iowa

GP05: Mississippi Valley, S.E. Missouri Pb-Zn (32a) (Late Paleozoic) , covers 18 % of this area

90%	50%	10%	5%	1%
2	3	3	6	8

LS01: Duluth Cu-Ni-PGE (5a) (Middle Proterozoic) , covers 27 % of this area

The number of undiscovered deposits in this tract was not estimated.

LS07: Sediment-hosted Cu, reduced-facies (modified) (30b.1) (Middle Proterozoic) , covers 45 % of this area

90%	50%	10%	5%	1%
2	5	10	10	10

LS09: Mississippi Valley, S.E. Missouri Pb-Zn (32a) (Late Paleozoic) , covers 82 % of this area

90%	50%	10%	5%	1%
0	0	0	1	2