Biwabik Iron Formation from Minnesota’s Mesabi Iron RangeĀ
Carbonate-bearing Biwabik Iron Formation (image courtesy of UMD-NRRI)
Siliceous Biwabik Iron Formation (image courtesy of UMD-NRRI)
Reflected Light Imagery of Sulfides and Oxides
Massive and Net Textured Magmatic Sulfide from the Duluth Complex
Chalcocite-bearing magnetite skarn
Transmitted Light Imagery of Igenous and Metamorphic Rocks
Mafic Intrusion with Chromite-Rich Xenolith
Quartz-Mica Schist







