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Some Land Management Problems in Our Western
The Plate Tectonic Setting of Cordilleran Deserts
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Africa arid and semiarid arid lands arid regions Arizona Artemisia tridentata Basin and Range caliche California Cenozoic Cercocarpus Chihuahuan Desert climatic change Colorado Plateau Colorado River County creosote bush Cretaceous Death Valley degradation deposits Desert Locust desertification drainage drier drought dunes early Holocene east El-Baz elevations environment erosion evolution fans fault Figure floras forest formation geologic geosyncline Grand Canyon Holocene Hunt important juniper woodland Lake landforms late Wisconsinan lower margin Mexico Miocene Mohave Desert Nevada North America northern occur Pacific packrat middens Paleozoic percent Picere Pimo Pimo Pinus pinyon plants playa Pleistocene Precambrian precipitation processes Quaternary Quercus Quercus pungens rain rainfall Range province rocks Sahara Sierra slopes Sonoran Desert southern Southwest southwestern species structural summer surface T. R. Van Devender taxa tectonic temperatures Texas tropical U.S. Geol uplift Utah vegetation Western Desert wind winter Yucca zone