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Soudan, Minnesota 55782

(Photos)

Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Soudan Mine, Soudan, Minnesota, USA) 4
Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Soudan Mine, Soudan, Minnesota, USA) 6
Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Soudan Mine, Soudan, Minnesota, USA) 7
Banded iron formation-sericite schist contact sample (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Soudan Mine, Soudan, Minnesota, USA) 1
Banded iron formation-sericite schist contact sample (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Soudan Mine, Soudan, Minnesota, USA) 2
Chlorite-sericite schist (Neoarchean; Soudan Mine, Soudan, Minnesota, USA) 1
Chlorite schist (Neoarchean; Soudan Mine, Soudan, Minnesota, USA) 1
Chlorite schist (Neoarchean; Soudan Mine, Soudan, Minnesota, USA) 2
Chlorite schist (Neoarchean; Soudan Mine, Soudan, Minnesota, USA) 3
Chlorite schist (Neoarchean; Soudan Mine, Soudan, Minnesota, USA) 4
Sericite-chlorite schist (Neoarchean; Soudan Mine, Soudan, Minnesota, USA) 1
Chlorite-sericite schist (Neoarchean; Soudan Mine, Soudan, Minnesota, USA) 2
Dacitic lapilli metatuff (dacitic meta-lapillistone) (Neoarchean, ~2.7-2.72 Ga; vicinity of Soudan Mine, Soudan, Minnesota, USA) 1
Dacitic lapilli metatuff (dacitic meta-lapillistone) (Neoarchean, ~2.7-2.72 Ga; vicinity of Soudan Mine, Soudan, Minnesota, USA) 2
Dacitic lapilli metatuff (dacitic meta-lapillistone) (Neoarchean, ~2.7-2.72 Ga; vicinity of Soudan Mine, Soudan, Minnesota, USA) 3
Pyritic dacitic lapilli metatuff (pyritic dacitic meta-lapillistone) (Neoarchean, ~2.7-2.72 Ga; vicinity of Soudan Mine, Soudan, Minnesota, USA)
Quartz-rich lapilli metatuff (quartz-rich meta-lapillistone) (Neoarchean, ~2.7-2.72 Ga; vicinity of Soudan Mine, Soudan, Minnesota, USA)
Dacitic lapilli metatuff (dacitic meta-lapillistone) (Neoarchean, ~2.7-2.72 Ga; vicinity of Soudan Mine, Soudan, Minnesota, USA) 4
Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, USA) 1
Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, USA) 2
Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, USA) 3
Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, USA) 4
Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, USA) 5
Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, USA) 6
Red quartz crystals lining void in specularite (Soudan Iron-Formation, Neoarchean, 2.722 Ga; Montana Stope, 27th level of the Soudan Mine, Soudan, Minnesota, USA) 7
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