Arizona is subject to a wide array of geologic hazards. That includes flooding, debris flows or mudslides, landslides, gradual land sinking (called subsidence) and earth fissures, swelling and ...
Eugene Shoemaker with some of the first geologic maps of the Moon, Flagstaff AZ, mid-1960's Many people are surprised when they learn that well before the first landing of Apollo in 1969, we already ...
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