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Soudan, Minnesota 55782

(Photos)

Quartz with hematite inclusions (hosted in Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, Minnesota, USA) 4

Quartz with hematite inclusions (hosted in Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, Minnesota, USA) 5

Quartz (hosted in Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, Minnesota, USA) 2

Pyrite & iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, Minnesota, USA) 1

Pyrite & iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, Minnesota, USA) 2

Pyrite & iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, Minnesota, USA) 3

Pyrite & iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, Minnesota, USA) 5

Pyrite (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; iron mine in Soudan, Minnesota, USA)

Stormy afternoon

Quartz crystals (Soudan Mine, Soudan, Minnesota, USA) 1

Quartz crystals (Soudan Mine, Soudan, Minnesota, USA) 2

Quartz crystals (Soudan Mine, Soudan, Minnesota, USA) 3

Quartz & hematite (Soudan Mine, Soudan, Minnesota, USA) 1

Quartz & hematite (Soudan Mine, Soudan, Minnesota, USA) 2

Quartz & hematite (Soudan Mine, Soudan, Minnesota, USA) 3

Quartz & hematite (Soudan Mine, Soudan, Minnesota, USA) 4

Quartz & hematite (Soudan Mine, Soudan, Minnesota, USA) 5

Quartz crystals (Soudan Mine, Soudan, Minnesota, USA) 4

Quartz-chalcopyrite (Soudan Mine, Soudan, Minnesota, USA)

Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Soudan Mine, Soudan, Minnesota, USA) 1

Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Soudan Mine, Soudan, Minnesota, USA) 2

Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.722 Ga; Soudan Mine, Soudan, Minnesota, USA) 3

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) 5

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