Category:Ordovician rocks in Arkansas
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Preceded by Proterozoic Eon | Phanerozoic Eon | |||||||||||
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Paleozoic Era | Mesozoic Era | Cenozoic Era | ||||||||||
Cambrian | Ordovician | Silurian | Devonian | Carboniferous | Permian | Triassic | Jurassic | Cretaceous | Paleogene | Neogene | 4ry |
Subcategories
This category has the following 3 subcategories, out of 3 total.