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Show ILLUSTRATIONS Page FIGURE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 ! 19 20 21 22 23 24 r 25 26 27 28 29 30 31 r 32 33 34 35 36 37 View west over Colorado River to the Orange Cliffs and the Henry Mountains The Wind River Mountains of Wyoming Looking down the Green River Valley from La Barge, Wyo Canyon Lands of southeastern Utah- looking over the junction of the Green and Colorado Rivers to the Henry Mountains from Dark Canyon Plateau . The great southern desert- Organ Pipe Cactus National Monument, Ariz Boreal Zone- Lake Brennan, Colo. .... .... Upper Sonoran Zone- Canyon Lands of southeastern Utah . Transition Zone- Shivwits Plateau ... .... Lower Sonoran Zone ...... .... Trout fishing is excellent on the Colorado River below Hoover Dam . From Lipan Point on the South Rim of the Grand Canyon can be seen the Echo Cliffs and Navajo Mountain ..... Cliff Palace in Mesa Verde National Park, Colo. Petroglyphs in the Needles area southeast of the junction of the Green and Colo rado Rivers ........ . Bonita lava flow and Sunset Crater .... . . San Xavier Mission near Tucson, Ariz. ..... Gunnison River above Gunnison, Colo. ..... The Grand Canyon at the mouth of Whitmore Wash Owachomo Bridge in Natural Bridges National Monument, Utah The Green River passes through Split Mountain, part of the Uinta upwarp The Great White Throne in Zion National Park, Utah The Colorado Plateau ...... Grand Gulch in the Canyon Lands of southeastern Utah . East side of the Kaibab Plateau upwarp .... Navajo Mountain ....... Elaborately carved frontal escarpment, Bryce Canyon National Park, Utah Gypsum Canyon at mouth of Fable Valley in the Canyon Lands of southeastern Utah Sunset Crater in Arizona ..... Abert squirrel of the Transition Zone .... Chipmunk of the Transition Zone . . . . The spreading ripple of a beaver ..... Desert bighorn in Lake Mead Recreational Area Mule deer ........ An Indian ruin on the Verde River- Tuzigoot National Monument, Ariz. Ventana Cave ........ ... Hohokam pottery effigy from Casa Grande National Monument, Ariz Hohokam carved shell ......... Casa Grande- a monument to the architectural ability of the Saladoans- Casa Grande National Monument ......... 86 xiil |
