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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 about 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. 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 19th-century clipper ship. Americans first called the peak "The Needle", a name given to the topmost pinnacle by Captain J. F. McComb in 1860. United States Geological Survey maps indicate that the name "Ship Rock" dates from the 1870s. Shiprock, an example of a volcanic neck, is composed of fractured volcanic breccia and black dikes of igneous rock called minette, a type of lamprophyre. It is the erosional remnant of the throat of a volcano, and the volcanic breccia formed in a diatreme. The rock probably was originally formed 2,500–3,000 feet (750–1,000 meters) below the Earth's surface, but it was exposed after millions of years of erosion. Wall-like sheets of minette, known as dikes, radiate away from the central formation. Radiometric age determinations of the minette establish that these volcanic rocks solidified about 27 million years ago. Shiprock is in the northeastern part of the Navajo volcanic field—a field that includes intrusions and flows of minette and other unusual igneous rocks that formed about 30 million years ago.

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Related concepts (3)

Navajo

The Navajo ('nævəhoʊ,_ˈnɑːvə-; also spelled Navaho; Diné or Naabeehó) are a Native American people of the Southwestern United States. With more than 399,494 enrolled tribal members , the Navajo Nation is the largest federally recognized tribe in the United States; additionally, the Navajo Nation has the largest reservation in the country. The reservation straddles the Four Corners region and covers more than 27,325 square miles (70,000 square km) of land in Arizona, Utah, and New Mexico.

Igneous rock

Igneous rock (igneous ), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusive rocks or on the surface as extrusive rocks.

Colorado Plateau

The Colorado Plateau, also known as the Colorado Plateau Province, is a physiographic and desert region of the Intermontane Plateaus, roughly centered on the Four Corners region of the southwestern United States. This province covers an area of 336,700 km2 (130,000 mi2) within western Colorado, northwestern New Mexico, southern and eastern Utah, northern Arizona, and a tiny fraction in the extreme southeast of Nevada. About 90% of the area is drained by the Colorado River and its main tributaries: the Green, San Juan, and Little Colorado.