Category:Concretions from the Ohio Shale
Subcategories
This category has only the following subcategory.
Media in category "Concretions from the Ohio Shale"
The following 9 files are in this category, out of 9 total.
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Pyrite concretion (Ohio Shale, Upper Devonian; Ross County, Ohio, USA) (18859053629).jpg 1,498 × 1,750; 2.6 MB