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Geologic map of the Poncha Pass area, Chaffee, Fremont, and Saguache Counties, Colorado, https://t.co/zXmmVzcRZA https://t.co/T4Z7ip4v5E
Geologic map of the Poncha Pass area, Chaffee, Fremont, and Saguache Counties, Colorado, https://t.co/zXmmVzcRZA https://t.co/T4Z7ip4v5E