Category:Biogeology of Minnesota

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This category has only the following subcategory.

Media in category "Biogeology of Minnesota"

The following 2 files are in this category, out of 2 total.

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  Wormstone (heavily bioturbated quartzose sandstone) (Mazomanie Formation, Upper Cambrian; riverside cliff, western side of the St. Croix River, northeast of Lookout Point, Minnesota, USA) 2 (18814916720).jpg 4,000 × 2,071; 2.64 MB
  
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  Wormstone (heavily bioturbated quartzose sandstone) (Mazomanie Formation, Upper Cambrian; riverside cliff, western side of the St. Croix River, northeast of Lookout Point, Minnesota, USA) 5 (18814890770).jpg 4,000 × 3,000; 3.83 MB