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Cet album fait partie des albums

↪ Geologic formations in Iowa
↪ Geologic formations in the United States by state by geochronology
↪ Geology of Iowa by geochronology
↪ Meta categories
↪ Stratigraphy of Iowa

Cet album photos contient les sous-albums suivants :

↪ Cambrian formations in Iowa
↪ Carboniferous formations in Iowa
↪ Cretaceous formations in Iowa
↪ Devonian formations in Iowa
↪ Mesozoic formations in Iowa
↪ Mississippian formations in Iowa
↪ Ordovician formations in Iowa
↪ Paleozoic formations in Iowa
↪ Pennsylvanian formations in Iowa
↪ Permian formations in Iowa