Discover the geological forces — ancient seas, volcanic fields, and nearly two billion years of exposed rock — that shaped Arizona's most iconic landscapes.
Arizona's landscape is a geology lesson on a grand scale — from the nearly two-billion-year-old rock layers exposed in the Grand Canyon to the volcanic fields north of Flagstaff, still geologically young by comparison. Together, these forces built one of the most varied and dramatic landscapes in the country.
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One of Arizona's youngest volcanoes, born from an eruption 900 years ago.
READ GUIDE →Arizona geology is unusually legible — layers, faults and lava flows sit in plain view once you know what to look for. Our guides narrate that story across the South Rim, the Painted Desert and the cinder cones north of Flagstaff, on private tours built around your pace and your questions.