The Cardenas Basalt, also known as either the Cardenas Lava or Cardenas Lavas, is a rock formation that outcrops over an area of about 310 km2 (120 mi2) in the eastern Grand Canyon, Coconino County, Arizona. The lower part of the Cardenas Basalt forms granular talus slopes. Its upper part forms nearly continuous low cliffs that are parallel to the general course of the Colorado River. The most complete, readily accessible, and easily studied exposure of the Cardenas Basalt lies in Basalt Canyon. This is also its type locality.
The Unkar Group is a sequence of strata of Proterozoic age that are subdivided into five geologic formations and exposed within the Grand Canyon, Arizona, Southwestern United States. The 5-unit Unkar Group is the basal member of the 8-member Grand Canyon Supergroup. The Unkar is about 1,600 to 2,200 m thick and composed, in ascending order, of the Bass Formation, Hakatai Shale, Shinumo Quartzite, Dox Formation, and Cardenas Basalt. Units 4 & 5 are found mostly in the eastern region of Grand Canyon. Units 1 through 3 are found in central Grand Canyon. The Unkar Group accumulated approximately between 1250 and 1104 Ma. In ascending order, the Unkar Group is overlain by the Nankoweap Formation, about 113 to 150 m thick; the Chuar Group, about 1,900 m (6,200 ft) thick; and the Sixtymile Formation, about 60 m (200 ft) thick. These are all of the units of the Grand Canyon Supergroup. The Unkar Group makes up approximately half of the thickness of the 8-unit Supergroup.
Located directly downstream of the Little Colorado River confluence with the Colorado River, the Tanner Graben, in the Grand Canyon, Arizona, US is a prominence and cliffside rock formation below the East Rim. Tanner Graben is located riverside, on the Colorado River, on a north-northwest bank at Mile 68.5, and lies opposite Tanner Canyon. The Tanner Rapid, created by Tanner Creek lies at the riverside foot of the graben. The graben is a pronounced feature because of the black Cardenas Basalt that forms the middle section of the graben, presumably free of debris accumulation by its cliff face steepness, and winds, and airflow drainage that course through the Colorado River's canyons; unprotected side canyons of Cardenas Basalt show accumulations as a slope-forming geologic unit, with little showing of black basalt.
The Hakatai Shale is a Mesoproterozoic rock formation with important exposures in the Grand Canyon, Coconino County, Arizona. It consists of colorful strata that exhibit colors varying from purple to red to brilliant orange. These colors are the result of the oxidation of iron-bearing minerals in the Hakatai Shale. It consists of lower and middle members that consist of bright-red, slope-forming, highly fractured, argillaceous mudstones and shale and an upper member composed of purple and red, cliff-forming, medium-grained sandstone. Its thickness, which apparently increases eastwards, varies from 137 to 300 m. In general, the Hakatai Shale and associated strata of the Unkar Group rocks dip northeast (10–30°) toward normal faults that dip 60° or more toward the southwest. This can be seen at the Palisades fault in the eastern part of the main Unkar Group outcrop area. In addition, thick, prominent, and dark-colored basaltic sills and dikes cut across the purple to red to brilliant orange strata of the Hakatai Shale.
The Shinumo Quartzite also known as the Shinumo Sandstone, is a Mesoproterozoic rock formation, which outcrops in the eastern Grand Canyon, Coconino County, Arizona,. It is the 3rd member of the 5-unit Unkar Group. The Shinumo Quartzite consists of a series of massive, cliff-forming sandstones and sedimentary quartzites. Its cliffs contrast sharply with the stair-stepped topography of typically brightly-colored strata of the underlying slope-forming Hakatai Shale. Overlying the Shinumo, dark green to black, fissile, slope-forming shales of the Dox Formation create a well-defined notch. It and other formations of the Unkar Group occur as isolated fault-bound remnants along the main stem of the Colorado River and its tributaries in Grand Canyon.
Typically, the Shinumo Quartzite and associated strata of the Unkar Group dip northeast (10°–30°) toward normal faults that dip 60+° toward the southwest. This can be seen at the Palisades fault in the eastern part of the main Unkar Group outcrop area.
The Dox Formation, also known as the Dox Sandstone, is a Mesoproterozoic rock formation that outcrops in the eastern Grand Canyon, Coconino County, Arizona. The strata of the Dox Formation, except for some more resistant sandstone beds, are relatively susceptible to erosion and weathering. The lower member of the Dox Formation consists of silty-sandstone and sandstone, and some interbedded argillaceous beds, that form stair-stepped, cliff-slope topography. The bulk of the Dox Formation typically forms rounded and sloping hill topography that occupies an unusually broad section of the canyon.
Holy Grail Temple is a 6,711-foot-elevation (2,046-meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. It is situated seven miles north-northeast of Havasupai Point, and two miles west-northwest of King Arthur Castle, within the Shinumo Amphitheater. Topographic relief is significant as it rises over 4,500 feet above the Colorado River in three miles. According to the Köppen climate classification system, Holy Grail Temple is located in a cold semi-arid climate zone, with precipitation runoff draining south to Shinumo Creek, which flows west to the Colorado River.
Chuar Butte is a prominent 6,500-foot-elevation (2,000-meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. It is situated 1.5 miles northwest of Cape Solitude on the canyon's East Rim, three miles southeast of Gunther Castle, and immediately west of the confluence of the Colorado River and Little Colorado River. This position also places it where Marble Canyon ends, and the Grand Canyon begins. Topographic relief is significant as it rises nearly 3,800 feet above the river in less than one mile. According to the Köppen climate classification system, Chuar Butte is located in a cold semi-arid climate zone.
Steamboat Mountain is a 7,410-foot-elevation (2,260-meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. It is situated four miles northwest of Holy Grail Temple, and 2.5 miles west-southwest of Timp Point on the North Rim. George Wharton James described it as a "majestic butte", nearly encircled by Galloway and Saddle Canyons. Topographic relief is significant as it rises over 5,400 feet above the Colorado River in three miles. According to the Köppen climate classification system, Steamboat Mountain is located in a Cold semi-arid climate zone, with precipitation runoff draining west to the Colorado River via Tapeats Creek and Stone Creek. This feature's name was officially adopted in 1932 by the U.S. Board on Geographic Names.
Cheops Pyramid is a 5,401-foot-elevation (1,646-meter) summit located in the Grand Canyon, in Coconino County of Arizona, US. This butte is situated four miles north of Grand Canyon Village, 2.5 miles south-southwest of Buddha Temple, and 1.7 mile south-southeast of Isis Temple, which is the nearest higher neighbor. Topographic relief is significant as it rises 3,000 feet above the Colorado River in 1.5 mile. It was named by George Wharton James for the fanciful resemblance to the famous pyramid constructed by Egyptian Pharaoh Cheops. This was in keeping with Clarence Dutton's tradition of naming geographical features in the Grand Canyon after mythological deities. This butte's name was officially adopted in 1906 by the U.S. Board on Geographic Names. According to the Köppen climate classification system, Cheops Pyramid is located in a Cold semi-arid climate zone.
Newberry Butte is a 5,105-foot-elevation (1,556-meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. It is situated 4.5 miles north of the South Rim's Grandview Point, three miles southwest of Vishnu Temple, and 2.5 miles south of Wotans Throne. Topographic relief is significant as it rises over 2,500 feet above the Colorado River and Granite Gorge in one mile. According to the Köppen climate classification system, Newberry Butte is located in a Cold semi-arid climate zone.
Solomon Temple is a 5,121-foot-elevation (1,561-meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, USA. It is situated four miles north of Moran Point, 3.5 miles east of Newberry Butte, and 1.5 mile southeast of Rama Shrine, its nearest higher neighbor. Topographic relief is significant as it rises 2,500 feet above the Colorado River in less than one mile.
Butchart Butte is a 7,602-foot (2,317 m)-elevation summit located in the Grand Canyon, in Coconino County of northern Arizona, United States. It is situated on the North Rim, midway between Gunther Castle and Siegfried Pyre, and between the Chuar and Kwagunt Valleys. Topographic relief is significant as it rises 4,900 feet (1,500 m) above the Colorado River in five miles.
King Arthur Castle is a 7,344-foot-elevation (2,238-meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. It is situated one-half mile northwest of Guinevere Castle, one mile west of Excalibur, and two miles east-southeast of Holy Grail Temple, within the Shinumo Amphitheater. Topographic relief is significant as it rises over 5,100 feet above the Colorado River in 4.5 miles (7.2 km). According to the Köppen climate classification system, King Arthur Castle is located in a cold semi-arid climate zone, with precipitation runoff draining west to the Colorado River via Shinumo Creek.
Evans Butte is a 6,379-foot-elevation (1,944-meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. It is situated at the north end of Sagittarius Ridge, three miles south-southwest of King Arthur Castle, and two miles southeast of Dox Castle. Topographic relief is significant as it rises over 4,100 feet above the Colorado River in 2.5 miles (4.0 km), and the north aspect rises 2,700 feet above Flint Creek in one mile. According to the Köppen climate classification system, Evans Butte is located in a cold semi-arid climate zone, with precipitation runoff draining west to the Colorado River via Shinumo Creek, Hotauta Canyon, and Monadnock Amphitheater. The butte is composed of Pennsylvanian-Permian Supai Group overlaying the cliff-forming Mississippian Redwall Limestone, and Cambrian Tonto Group. Evans Butte was climbed solo by Harvey Butchart on October 11, 1976, thereby making it the 76th of the 83 summits which he climbed in the Grand Canyon.
Fan Island is a 5,092-foot-elevation (1,552-meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. It is situated two miles south of Dutton Point, 2.5 miles west-northwest of Dox Castle, and 1.6 miles south-southwest of Masonic Temple. Topographic relief is significant as it rises 2,900 feet above the Colorado River in one mile (1.6 km). Fan Island was so named because the flat top resembles an unfolded hand fan. According to the Köppen climate classification system, Fan Island is located in a cold semi-arid climate zone, with precipitation runoff draining south to the Colorado River via Hakatai Canyon from the west aspect, and Burro Canyon from the east aspect. This butte is an erosional remnant composed of Redwall Limestone overlaying the Tonto Group.
Masonic Temple is a 6,242-foot-elevation (1,903-meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. Set below Dutton Point on the Powell Plateau, and overlooking the Shinumo Amphitheater, it is situated three miles west of Holy Grail Temple, 2.7 miles northwest of Dox Castle, and 1.6 miles north-northeast of Fan Island. Topographic relief is significant as it rises 4,000 feet above the Colorado River in four miles (6.4 km). According to the Köppen climate classification system, Masonic Temple is located in a cold semi-arid climate zone, with precipitation runoff draining south to the Colorado River via Hakatai Canyon from the west aspect, Burro Canyon from the south aspect, and Muav Canyon from the east aspect. This butte is an erosional remnant composed of strata of the Pennsylvanian-Permian Supai Group overlaying the conspicuous cliffs of Mississippian Redwall Limestone, in turn overlaying the Cambrian Tonto Group.
Grand Scenic Divide is a 5,667-foot-elevation (1,727-meter) ridge located in the Grand Canyon, in Coconino County of northern Arizona, Southwestern United States. It is situated immediately north of Fossil Mountain, and 1.5 mile east of Mount Huethawali. Surrounded by Bass and Serpentine Canyons, topographic relief is significant as it rises over 3,400 feet above the nearby Colorado River in 1.5 mile. It is composed of strata of the Pennsylvanian-Permian Supai Group. Further down are strata of the cliff-forming Mississippian Redwall Limestone, and Cambrian Tonto Group. According to the Köppen climate classification system, Grand Scenic Divide is located in a cold semi-arid climate zone. The normal approach to the ridge is made via the South Bass Trail, and from the top the view includes Masonic Temple, Holy Grail Temple, Dox Castle, King Arthur Castle, Evans Butte, Sagittarius Ridge, and Scorpion Ridge.
Guinevere Castle is a 7,281-foot-elevation (2,219 meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. It is situated one-half mile southeast of King Arthur Castle, one mile west of Excalibur, and 2.5 miles northeast of Evans Butte, within the Shinumo Amphitheater. Topographic relief is significant as it rises 5,000 feet above the Colorado River in 4.5 miles, and 2,600 feet above Gawain Abyss in one mile. According to the Köppen climate classification system, Guinevere Castle is located in a cold semi-arid climate zone.
Elaine Castle is a 7,431-foot-elevation (2,265 meter) summit located in the Grand Canyon, in Coconino County of northern Arizona, US. It is situated three miles north-northwest of King Arthur Castle near the head of Shinumo Creek, and immediately southwest of Lancelot Point. Topographic relief is significant as it rises 2,800 feet above Merlin Abyss in one mile. According to the Köppen climate classification system, Elaine Castle is located in a cold semi-arid climate zone.
