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Mogollon Rim

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The Mogollon Rim ( / m ʌ ɡ ɪ ˈ j oʊ n / or / m oʊ ɡ ə ˈ j oʊ n / or / m ɒ ɡ ɒ dʒ ɔː n / ) is a topographical and geological feature cutting across the northern half of the U.S. state of Arizona . It extends approximately 200 miles (320 km), starting in northern Yavapai County and running eastward, ending near the border with New Mexico . It forms the southern edge of the Colorado Plateau in Arizona .

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13-573: The Rim is an escarpment defining the southwestern edge of the Colorado Plateau . Its central and most spectacular portions are characterized by high cliffs of limestone and sandstone , namely the Kaibab Limestone and Coconino Sandstone cliffs. The escarpment was created by erosion and faulting , creating canyons such as Fossil Creek Canyon and Pine Canyon. The name Mogollon comes from Don Juan Ignacio Flores Mogollón ,

26-520: A strike-slip fault brings a piece of high ground adjacent to an area of lower ground. Earth is not the only planet where escarpments occur. They are believed to occur on other planets when the crust contracts , as a result of cooling. On other Solar System bodies such as Mercury , Mars , and the Moon , the Latin term rupes is used for an escarpment. When sedimentary beds are tilted and exposed to

39-682: A hunting cabin on the slopes of the Mogollon Rim just northeast of Payson, above Tonto Creek. The cabin was restored by the Phoenix air-conditioning magnate William Goettl during the late 1960s, but it was destroyed by the Dude Fire in 1990. Louis L'Amour 's novel The Sackett Brand , set near the Mogollon Rim, includes descriptions of its cliffs. 34°20′12″N 110°56′14″W  /  34.33667°N 110.93722°W  / 34.33667; -110.93722 Escarpment An escarpment

52-433: Is a ridge which has a gentle slope on one side and a steep scarp on the other side. More loosely, the term scarp also describes a zone between a coastal lowland and a continental plateau which shows a marked, abrupt change in elevation caused by coastal erosion at the base of the plateau . Scarps are generally formed by one of two processes: either by differential erosion of sedimentary rocks , or by movement of

65-435: Is a steep slope or long cliff that forms as a result of faulting or erosion and separates two relatively level areas having different elevations . The terms scarp and scarp face are often used interchangeably with escarpment . Some sources differentiate the two terms, with escarpment referring to the margin between two landforms , and scarp referring to a cliff or a steep slope. In this usage an escarpment

78-469: The Earth's crust at a geologic fault . The first process is the more common type: the escarpment is a transition from one series of sedimentary rocks to another series of a different age and composition. Escarpments are also frequently formed by faults. When a fault displaces the ground surface so that one side is higher than the other, a fault scarp is created. This can occur in dip-slip faults , or when

91-736: The Rocky Mountains living on the top of the plateau, and species native to the Mexican Sierra Madre Occidental on the slopes below and in the Madrean Sky Islands (high, isolated mountain ranges) further south. The Mogollon Rim's limestones and sandstones were formed from sediments deposited in the Carboniferous and Permian Periods . Several of the Rim's rock formations are also seen on

104-404: The Mogollon Rim include Payson , Sedona , Show Low , Alpine and Pinetop-Lakeside . The Mogollon Rim is practically bisected by Interstate 17 which runs north-to-south between Flagstaff and Phoenix . In June 2002, the eastern portion of the Mogollon Rim was the site of Arizona's second-largest wildfire , the 470,000-acre (1,900 km) Rodeo–Chediski Fire . The Mogollon Rim was also

117-507: The Spanish Governor of New Mexico from 1712 to 1715. Much of the land south of the Mogollon Rim lies 4,000 to 5,000 feet (1,200 to 1,500 m) above sea level , with the escarpment rising to about 8,000 ft (2,400 m). Extensive Ponderosa pine forests are found both on the slopes of the Rim and on the plateau to the north. The Mogollon Rim is a major floristic and faunal boundary, with species characteristic of

130-899: The elements. Slope landform Landforms are categorized by characteristic physical attributes such as their creating process, shape, elevation, slope, orientation, rock exposure, and soil type. Landforms organized by the processes that create them. Aeolian landform  – Landforms produced by action of the winds include: Coastal and oceanic landforms include: Landforms produced by erosion and weathering usually occur in rocky or fluvial environments, and many also appear under those headings. Fluvial  – Sediment processes associated with rivers and streams Pages displaying short descriptions of redirect targets landforms include: Landforms created by extraterrestrial impacts  – Collision of two astronomical objects – include: Lacustrine – associated with lakes – landforms include: Mountain and glacial landform  – Landform created by

143-449: The site of the Dude fire that started on June 25, 1990. This fire grew to cover over 30,000 acres (120 km) and killed six wildland firefighters. Other large fires have burned along the Mogollon Rim since 1990, and the area's Ponderosa pine forests remain vulnerable because of past fire-suppression efforts and the buildup of available dry fuel. Western novel author Zane Grey built

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156-417: The surface, erosion and weathering may occur. Escarpments erode gradually and over geological time . The mélange tendencies of escarpments results in varying contacts between a multitude of rock types. These different rock types weather at different speeds, according to Goldich dissolution series so different stages of deformation can often be seen in the layers where the escarpments have been exposed to

169-631: The walls of the Grand Canyon . In many places, the Rim is capped or buried by the extensive basaltic lava flows. The uppermost sandstone stratum of the Mogollon Rim, called the Coconino Sandstone , forms white cliffs that sometimes reach several hundred feet high. This formation of the Permian Period is of aeolian (windblown) origin and is one of the thickest sand-dune-derived sandstones on earth. Cities and towns near

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