Pages of Stone: Geology of the Grand Canyon and Plateau Country National Parks and Monuments
From the sheer-walled magnificence of Zion to thebreathtaking intricacy of Bryce Canyon's sculpturedturrets; from the "Grand Staircase" of the VermilionCliffs, and Pink Cliffs in southern Utah to the volcaniclavas of Sunset Crater: two geologists describe the starattractions of 24 national parks and monuments. Newsidebars provide ......
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anticline arches Arizona Basin Bryce Cambrian canyon walls Capitol Reef carved Cedar Mesa Cenozoic Chinle Formation cliffs color Colorado Plateau Colorado River conglomerate contains Cretaceous cross-bedding crust dams dark deposited desert varnish dinosaur dome dunes east edge Entrada eroded erosion eruptions faults feet floodplain formed fossils GEOLOGIC HISTORY Grand Canyon gray gypsum Halka Chronic photo horizontal Jurassic Kaibab Kayenta Formation lake lava flows ledges limestone Lucy Chronic photo magma marine Mesozoic meters miles million years ago minerals Moenkopi Formation monoclines mudstone national monument National Park Navajo Sandstone Paleozoic Permian petrified pink Pleistocene Precambrian Precambrian rocks Ray Strauss photo region ridges ripple marks rock layers Rocky Mountains salt sedimentary rocks sediments shale sidebar silt siltstone slopes STAR FEATURES stone strata streams Sunset Crater surface Tertiary thick Toroweap trail Triassic tributaries uplift Utah valley visitor center volcanic ash washed Waterpocket wind Wingate Sandstone Zion