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

Mineral assessment tracts in Madera county, California

[Additional scientific data in this geographic area]

GB01: Skarn Cu (18b) (Mesozoic - Tertiary) , covers 0.5 % of this area

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

GB07: Porphyry Cu (17) (Mesozoic - Tertiary) , covers 0.5 % of this area

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

GB14: Polymetallic replacement + skarn Zn-Pb (19a + 18c) (Mesozoic - Tertiary) , covers 0.5 % of this area

90%	50%	10%	5%	1%
0	3	5	8	8

GB22: Epithermal vein, Comstock (25c) (Tertiary) , covers 0.2 % of this area

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

GB25: Epithermal vein, quartz-alunite (25e) (Tertiary) , covers 0.2 % of this area

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

PC03: Skarn Cu (18b) (Mesozoic) , covers 15 % of this area

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

PC08: Porphyry Cu (17) (Mesozoic) , covers 75 % of this area

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

PC40: Low-sulfide Au-quartz vein (36a) (Mesozoic) , covers 39 % of this area

90%	50%	10%	5%	1%
2	6	9	12	15