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Powell named the Uinkaret Plateau and applied the names of Mount Trumbull, Mount Logan, and Mt. Emma to prominent peaks. He discovered the Toroweap Fault and estimated its displacement to be about 244 m (800 ft) (Powell, 1875). Geologic maps of the Mount Logan and Mount Trumbull NW quadrangles (Billingsley, 1997a, b) are compiled into the western half of the map area. Geologic … ................
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