Category:Slate of the Biwabik Iron-Formation

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This category has only the following subcategory.

Media in category "Slate of the Biwabik Iron-Formation"

The following 4 files are in this category, out of 4 total.

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  Slate (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, Minnesota, USA) 1 (31634425305).jpg 3,355 × 2,499; 5.36 MB
  
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  Slate (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, Minnesota, USA) 2 (30824248003).jpg 2,894 × 1,952; 4.2 MB
  
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  Slate (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, Minnesota, USA) 3 (34281531540).jpg 2,370 × 2,270; 2.67 MB
  
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  Slate (Biwabik Iron-Formation, Paleoproterozoic, ~1.878 Ga; Thunderbird Mine, Mesabi Iron Range, Minnesota, USA) 4 (33824259464).jpg 2,454 × 2,394; 3.49 MB