There is about 427 m (1,400 ft) of Proterozoic crystalline metamorphic rocks, 1,450 m (4,760 ft) of Paleozoic strata, Lower Cambrian to Lower Permian age in the walls of Grand Canyon, and about 305 m (1,000 ft) of Tertiary sediments in the map area. The Paleozoic and Tertiary rocks are partly covered by Quaternary surficial alluvial and eolian sand deposits and volcanic rocks on the Shivwits Plateau and Hualapai Plateau. Monoclines, high-angle normal faults, and breccia pipes are characteristic structures dominated by the Horse Flat, Meriwhitica, Hurricane, Toroweap, and Aubrey Monoclines; the Grand Wash, Meriwhitica, Hurricane, Toroweap, and Aubrey Faults. The map area lies within the southwestern part of the Colorado Plateaus geologic province and a small part of the southeastern Basin and Range geologic province in northwestern Arizona. The map is locally subdivided into seven physiographic parts, the Grand Canyon, Sanup Plateau, Shivwits Plateau, Hualapai Plateau, Coconino Plateau, Truxton Valley, and Aubrey Valley of the Colorado Plateaus; and the Hualapai Valley of the Basin and Range. The map area is bounded by long. 113° to 114° and lat. 36° to 36°30'. Peach Springs and Grand Canyon Caverns are the only communities within the map area along U.S. Highway 66.
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Three map document annotation groups -- FaultAnnotation, FaultDisplacementMeters, and FoldAnnotation -- are associated with the layers psglg_line, psglg_line, and psfld_line respectively. Dynamic label features are utilized to display degree of dip and map unit name on the layers psatd_point and psglg_polygon respectively.