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Cet album fait partie des albums

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Cet album photos contient les sous-albums suivants :

↪ Cambrian geology of North America
↪ Carboniferous geology of North America
↪ Cretaceous geology of North America
↪ Devonian geology of North America
↪ Ediacaran geology of North America
↪ Jurassic geology of North America
↪ Mississippian geology of North America
↪ Neogene geology of North America
↪ Ordovician geology of North America
↪ Pennsylvanian geology of North America