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Tungsten (also called wolfram) [14] [15] is a chemical element; it has symbol W and atomic number 74. It is a metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a distinct element in 1781 and first isolated as a metal in 1783.
Ajo Range, Organ Pipe Cactus National Monument Artillery Mountains above Alamo Lake Dragoon Mountains View of the Galiuro Mountains from San Manuel, Arizona Harquahala Mountains in spring, 2009 McDowell Mountains at sunset Low clouds on the Mohawk Mountains Navajo Mountain and Lake Powell, viewed from the north Eagle Eye Arch in the New Water ...
Mount Graham summits are headwaters for numerous perennial streams that tumble through five major botanical zones. Located between the southern Rocky Mountains and Mexico's Sierra Madre Occidental, and biologically isolated for millennia, the higher elevations have provided refuge for relict populations of plants and animals with adaptive strategies rooted in Pleistocene ice age environmental ...
The location of Arizona in the United States. Arizona is a landlocked state situated in the southwestern region of the United States of America.It has a vast and diverse geography famous for its deep canyons, high- and low-elevation deserts, numerous natural rock formations, and volcanic mountain ranges.
Many small mountain ranges in western Arizona, including the Superstition, Galiuro, Chiricahua and Tumacacori mountains are predominantly made up of ash flow tuff from these eruptions. The eruptions are believed to have been partly the result of increasing steep slab subduction into the mantle and magmatic activity shifted from the east to the ...
The Estrella Mountains or The Sierra Estrella (O'odham: Komaḍk, Maricopa: Vii Lyxa, Yavapai: Wi:kchasa) is a mountain range located southwest of Phoenix, Arizona.Much of the range falls within the Gila River Indian Reservation, but 14,400 acres (5,800 ha) of BLM land is protected as the Sierra Estrella Wilderness, and is also located near Goodyear, Arizona
Clasts of smaller grained granite are also found in the large-grained granite. The meta-sedimentary rock along with the granite batholith that forms Black Mountain are remnants of what laid hidden beneath a sea and underground, that are now exposed by headward erosion that continues northward today into Arizona's Transition Zone. The highly ...
The Mazatzal Mountains (MAH-zaht-ZAL, locally Ma-tuh-ZEL) are a mountain range in south central Arizona, about 30–45 miles northeast of the Phoenix metropolitan area. The origin of the name remains obscure but one possibility is that it is from the Nahuatl language meaning "place of the deer".