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Interbedded quaternary volcanic ash horizons in Arizona
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Interbedded pleistocene volcanic ash horizons in Arizona
(1 C)
Categories
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Quaternary pyroclastic rocks in Arizona
Quaternary eruption products in Arizona
Ash horizons (volcanic) in the United States
Volcanic ash in Arizona
Interbedded cenozoic volcanic ash horizons in Arizona
Quaternary volcanism of Arizona
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