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Shiprock
Shiprock (, "rock with wings" or "winged rock") is a monadnock rising nearly above the high-desert plain of the Navajo Nation in San Juan County, New Mexico, United States. Its peak elevation is above sea level. It is southwest of the town of Shiprock, which is named for the peak. Governed by the Navajo Nation, the formation is in the Four Corners region and plays a significant role in Navajo religion, myth, and tradition. Shiprock is a point of interest for rock climbers and photographers and has been featured in several film productions and novels. It is the most prominent landmark in northwestern New Mexico. In 1975, Shiprock was designated a National Natural Landmark by the National Park Service. Name The Navajo name for the peak, , "rock with wings" or "winged rock", refers to the legend of the great bird that brought the Navajo from the north to their present lands. The name "Shiprock" or Shiprock Peak or Ship Rock derives from the peak's resemblance to an enormous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shiprock, New Mexico
Shiprock () is an Unincorporated area#United States, unincorporated community on the Navajo Nation, Navajo reservation in San Juan County, New Mexico, United States. The population was 7,718 people in the 2020 United States census, 2020 census. For statistical purposes, the United States Census Bureau has defined Shiprock as a census-designated place (CDP). It is part of the Farmington, New Mexico, Farmington Metropolitan Statistical Area. Shiprock is named after the nearby Shiprock rock formation. Since 1903, the town has been called ''Naat’áanii Nééz'' (meaning “tall leader” in the Navajo language) after the San Juan Indian Agency superintendent William T. Shelton who settled Shiprock for the United States government. Diné College is a local four-year college (formerly Navajo Community College), a Tribal colleges and universities, tribally controlled community college with seven other campuses across the Navajo Nation. It is the site of a Chapter House for the Navaj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navajo Nation
The Navajo Nation (), also known as Navajoland, is an Indian reservation of Navajo people in the United States. It occupies portions of northeastern Arizona, northwestern New Mexico, and southeastern Utah. The seat of government is located in Window Rock, Arizona. At roughly , the Navajo Nation is the largest Indian reservation in the United States, exceeding the size of List of U.S. states and territories by area, ten U.S. states. It is one of the few reservations whose lands overlap the nation's traditional homelands. In 2010, the reservation was home to 173,667 out of 332,129 Navajo tribal members; the remaining 158,462 tribal members lived outside the reservation, in urban areas (26%), border towns (10%), and elsewhere in the U.S. (17%). In 2020, the number of tribal members increased to 399,494, surpassing the Cherokee Nation as the largest tribal group by enrollment. The U.S. Mexican Cession, gained ownership of what is today Navajoland in 1848 following the Mexican–A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Juan County, New Mexico
San Juan County () is a County (United States), county located in the U.S. state of New Mexico. As of the 2020 United States census, 2020 census, its population was 121,661 making it the fifth-most populous county in New Mexico. Its county seat is Aztec, New Mexico, Aztec. The county was created in 1887. San Juan County is part of the Farmington, New Mexico, metropolitan statistical area. It is in the state's northwest corner and includes the New Mexico portion of the Four Corners. Geography According to the United States Census Bureau, U.S. Census Bureau, the county has a total area of , of which (0.5%) are covered by water. Indian reservations (and off-reservation trust lands) comprise 63.4% of the county's land area. The Navajo Nation takes up 60.45% and the Ute Mountain Ute Tribe Reservation occupies another 2.93%. The physical features include three rivers - the San Juan, Animas, and La Plata Rivers, and the Chuska Mountains and Shiprock Pinnacle to the west, volcan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamprophyre
Lamprophyres () are uncommon, small-volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks, and small intrusions. They are alkaline silica- undersaturated mafic or ultramafic rocks with high magnesium oxide, >3% potassium oxide, high sodium oxide, and high nickel and chromium. Lamprophyres occur throughout all geologic eras. Archaean examples are commonly associated with lode gold deposits. Cenozoic examples include magnesian rocks in Mexico and South America, and young ultramafic lamprophyres from Gympie in Australia with 18.5% MgO at ~250 Ma. Petrology Modern science treats lamprophyres as a catch-all term for ultrapotassic mafic igneous rocks which have primary mineralogy consisting of amphibole or biotite, and with feldspar in the groundmass. Lamprophyres are not amenable to classification according to modal proportions, such as the system QAPF, because of their peculiar mineralogy, nor compositional discrimination diagrams, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Mexico
New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also borders the state of Texas to the east and southeast, Oklahoma to the northeast, and shares Mexico-United States border, an international border with the Mexican states of Chihuahua (state), Chihuahua and Sonora to the south. New Mexico's largest city is Albuquerque, and its List of capitals in the United States, state capital is Santa Fe, New Mexico, Santa Fe, the oldest state capital in the U.S., founded in 1610 as the government seat of Santa Fe de Nuevo México, Nuevo México in New Spain. It also has the highest elevation of any state capital, at . New Mexico is the List of U.S. states and territories by area, fifth-largest of the fifty states by area, but with just over 2.1 million residents, ranks List of U.S. states and terri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monadnock
An inselberg or monadnock ( ) is an isolated rock hill, knob, ridge, or small mountain that rises abruptly from a gently sloping or virtually level surrounding plain. In Southern Africa, a similar formation of granite is known as a koppie, an Afrikaans word ("little head") from the Dutch diminutive word ''kopje''. If the inselberg is dome-shaped and formed from granite or gneiss, it can also be called a bornhardt, though not all bornhardts are inselbergs. An inselberg results when a body of rock resistant to erosion, such as granite, occurring within a body of softer rocks, is exposed by differential erosion and lowering of the surrounding landscape. Etymology Inselberg The word ''inselberg'' is a loan word from German, and means "island mountain". The term was coined in 1900 by geologist Wilhelm Bornhardt (1864–1946) to describe the abundance of such features found in eastern Africa. At that time, the term applied only to arid landscape features. However, it has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Four Corners
Four Corners is a region of the Southwestern United States consisting of the southwestern corner of Colorado, southeastern corner of Utah, northeastern corner of Arizona, and northwestern corner of New Mexico. Most of the Four Corners region belongs to semi-autonomous Native American nations, the largest of which is the Navajo Nation, followed by Hopi, Ute, and Zuni tribal reserves and nations. The Four Corners region is part of a larger region known as the Colorado Plateau and is mostly rural, rugged, and arid. The Four Corners area is named after the quadripoint at the intersection of approximately 37° north latitude with 109° 03′ west longitude, where the boundaries of the four states meet, and is marked by the Four Corners Monument. It is the only location in the United States where four states meet. In addition to the monument, commonly visited areas within Four Corners include Monument Valley, Mesa Verde National Park, Chaco Canyon, Canyons of the Ancients ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agathla
Agathla Peak or Agathlan (, ) is a peak south of Monument Valley, Arizona, which rises over above the surrounding terrain. It is north of Kayenta and is visible from U.S. Route 163. The English designation ''Agathla'' is derived from the Navajo name ' meaning 'much wool', apparently for the fur of antelope and deer accumulating on the rock. The mountain is considered sacred by the Navajo. Agathla Peak is an eroded volcanic plug consisting of volcanic breccia cut by dikes of an unusual igneous rock called minette. It is one of many such volcanic diatremes that are found in Navajo country of northeast Arizona and northwest New Mexico. Agathla Peak and Shiprock in New Mexico are the most prominent. These rocks are part of the Navajo Volcanic Field, in the southern Colorado Plateau. Ages of these minettes and associated more unusual igneous rocks cluster near 25 million years. Climbing history Rock climbing is not currently allowed on Agathla Peak and surrounding Navaj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dike (geology)
In geology, a dike or dyke is a sheet of rock that is formed in a fracture of a pre-existing rock body. Dikes can be either magmatic or sedimentary in origin. Magmatic dikes form when magma flows into a crack then solidifies as a sheet intrusion, either cutting across layers of rock or through a contiguous mass of rock. Clastic dikes are formed when sediment fills a pre-existing crack.Essentials of Geology, 3rd Ed, Stephen Marshak Magmatic dikes A magmatic dike is a sheet of igneous rock that cuts across older rock beds. It is formed when magma fills a fracture in the older beds and then cools and solidifies. The dike rock is usually more resistant to weathering than the surrounding rock, so that erosion exposes the dike as a natural wall or ridge. It is from these natural walls that dikes get their name. Dikes preserve a record of the fissures through which most mafic magma (fluid magma low in silica) reaches the surface. They are studied by geologists for the clues they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Neck
A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth's plate boundaries are underwater, most volcanoes are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes resulting from divergent tectonic activity are usually non-explosive whereas those resulting from convergent tectonic activity cause violent eruptions."Mid-ocean ridge tectonics, volcanism and geomorphology." Geology 26, no. 455 (2001): 458. https://macdonald.faculty.geol.ucsb.edu/papers/Macdonald%20Mid-Ocean%20Ridge%20Tectonics.pdf Volcanoes can also form where there is stretching a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcano
A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth's plate boundaries are underwater, most volcanoes are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes resulting from divergent tectonic activity are usually non-explosive whereas those resulting from convergent tectonic activity cause violent eruptions."Mid-ocean ridge tectonics, volcanism and geomorphology." Geology 26, no. 455 (2001): 458. https://macdonald.faculty.geol.ucsb.edu/papers/Macdonald%20Mid-Ocean%20Ridge%20Tectonics.pdf Volcanoes can also form where there is str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fifty Classic Climbs Of North America
''Fifty Classic Climbs of North America'' is a 1979 climbing guidebook Climbing guidebooks are used by mountaineers, alpinists, ice climbers, and rock climbers to locate, grade, and navigate climbing routes on mountains, climbing crags, or bouldering areas. Modern route guidebooks include detailed information o ... and history written by Steve Roper and Allen Steck. It is considered a classic piece of climbing literature, known to many climbers as simply "The Book", and has served as an inspiration for more recent climbing books, such as Mark Kroese's ''Fifty Favorite Climbs''. Though much of the book's contents are now out of date, it is still recognized as a definitive text which goes beyond the traditional guidebook. History The first edition was published in 1979, by Sierra Club Books in the United States and in Great Britain by the now-defunct Diadem Books. This was followed by a paperback printing by Random House in 1981. Two subsequent editions (with the same c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
