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Cet album fait partie des albums

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↪ Oligocene geology of the United States by state
↪ Oligocene volcanism of the United States
↪ Paleogene volcanism of the United States by state
↪ Volcanism of the United States by state by geochronology

Cet album photos contient les sous-albums suivants :

↪ Oligocene eruption products in the United States by state
↪ Oligocene igneous intrusions in the United States by state
↪ Oligocene igneous rocks in the United States by state
↪ Oligocene pyroclastic rocks in the United States by state
↪ Oligocene volcanic rocks in the United States by state
↪ Oligocene volcanism of Alaska
↪ Oligocene volcanism of Arizona
↪ Oligocene volcanism of California
↪ Oligocene volcanism of Colorado
↪ Oligocene volcanism of Nevada