Category:Gunflint chert

Media in category "Gunflint chert"

The following 5 files are in this category, out of 5 total.

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  Asteroid tsunami in the Gunflint 1,850 my.jpg 3,600 × 2,170; 3.86 MB
  
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  Gunflint Chert (Paleoproterozoic, ~1.878 Ga; near Port Arthur, Ontario, Canada) 1 (45257036305).jpg 3,450 × 1,362; 3.61 MB
  
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  Gunflint Chert (Paleoproterozoic, ~1.878 Ga; near Port Arthur, Ontario, Canada) 2 (45445592754).jpg 3,759 × 1,842; 4.39 MB
  
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  Microfossils Gunflint Chert 1.88 Ga.png 1,230 × 1,046; 1.66 MB
  
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  Microfossils of microbes similar to cyanobacteria, Gunflint Formation, north shore of Lake Superior, 1.9 billion years old, chert - Redpath Museum - McGill University - Montreal, Canada - DSC07897.jpg 2,727 × 2,221; 3.22 MB