Category:Tyrone Limestone, Black River Group
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Media in category "Tyrone Limestone, Black River Group"
The following 2 files are in this category, out of 2 total.
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Mudcracked limestone (Tyrone Limestone, Middle Ordovician, 454 Ma; Frankfort, Kentucky) 1.jpg 5,974 × 4,748; 21.22 MB
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Mudcracked limestone (Tyrone Limestone, Middle Ordovician, 454 Ma; Frankfort, Kentucky) 2.jpg 5,018 × 3,095; 11.78 MB