Category:Mattoon Formation
Subcategories
This category has only the following subcategory.
Media in category "Mattoon Formation"
The following 2 files are in this category, out of 2 total.
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Illinois Basin Pennsylvanian strata cross section.jpg 1,243 × 673; 95 KB
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Illinois Basin Pennsylvanian stratigraphy.jpg 1,118 × 732; 133 KB