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

Mineral assessment tracts in Linn county, Oregon

PC05: Porphyry Cu (BC-AK) (17) (Tertiary) , covers 74 % of this area

90%	50%	10%	5%	1%
1	3	10	10	10

PC20: Epithermal vein, Comstock (25c) (Tertiary) , covers 8 % of this area

90%	50%	10%	5%	1%
0	1	3	5	5

PC27: Epithermal vein, Sado (25d) (Tertiary) , covers 75 % of this area

90%	50%	10%	5%	1%
0	2	5	8	8

PC28: Hot-spring Au-Ag (25a) (Tertiary) , covers 83 % of this area

90%	50%	10%	5%	1%
0	1	3	5	7