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Sailing Stones
Sailing stones (also called sliding rocks, walking rocks, rolling stones, and moving rocks) are part of the geological phenomenon in which rocks move and inscribe long tracks along a smooth valley floor without animal intervention. The movement of the rocks occurs when large, thin sheets of ice floating on an ephemeral winter pond move and break up due to wind. Trails of sliding rocks have been observed and studied in various locations, including Little Bonnie Claire Playa, in Nevada, and most famously at Racetrack Playa, Death Valley National Park, California, where the number and length of tracks are notable. Description The Racetrack's stones speckle the playa floor, predominantly in the southern portion. Historical accounts identify some stones around from shore, yet most of the stones are found relatively close to their respective originating outcrops. Three lithologic types are identified: * syenite, found most abundant on the west side of the playa; * dolomite, sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Racetrack Playa In Death Valley National Park
A race track (racetrack, racing track or racing circuit) is a facility built for racing of vehicles, athletes, or animals (e.g. horse racing or greyhound racing). A race track also may feature grandstands or concourses. Race tracks are also used in the study of animal locomotion. A ''racetrack'' is a permanent facility or building. ''Racecourse'' is an alternate term for a horse racing track, found in countries such as the United Kingdom, India, Australia, Hong Kong, and the United Arab Emirates. Race tracks built for bicycles are known as ''velodromes''. ''Circuit'' is a common alternate term for race track, given the circuit configuration of most race tracks, allowing races to occur over several laps. Some race tracks may also be known as ''speedways'', or ''raceways''. A ''race course'', as opposed to a ''racecourse'', is a nonpermanent track for sports, particularly road running, water sports, road racing, or rallying. Many sports usually held on race tracks also can occur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rock Formations Of Nevada
Rock most often refers to: * Rock (geology), a naturally occurring solid aggregate of minerals or mineraloids * Rock music, a genre of popular music Rock or Rocks may also refer to: Places United Kingdom * Rock, Caerphilly, a location in Wales * Rock, Cornwall, a village in England * Rock, County Tyrone, a village in Northern Ireland * Rock, Devon, a location in England * Rock, Neath Port Talbot, a location in Wales * Rock, Northumberland, a village in England * Rock, Somerset, a location in England * Rock, West Sussex, a hamlet in Washington, England * Rock, Worcestershire, a village and civil parish in England United States * Rock, Kansas, an unincorporated community * Rock, Michigan, an unincorporated community * Rock, West Virginia, an unincorporated community * Rock, Rock County, Wisconsin, a town in southern Wisconsin * Rock, Wood County, Wisconsin, a town in central Wisconsin Elsewhere * Corregidor, an island in the Philippines also known as "The Rock" * Jamaica, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural History Of The Mojave Desert
Nature is an inherent character or constitution, particularly of the ecosphere or the universe as a whole. In this general sense nature refers to the laws, elements and phenomena of the physical world, including life. Although humans are part of nature, human activity or humans as a whole are often described as at times at odds, or outright separate and even superior to nature. During the advent of modern scientific method in the last several centuries, nature became the passive reality, organized and moved by divine laws. With the Industrial Revolution, nature increasingly became seen as the part of reality deprived from intentional intervention: it was hence considered as sacred by some traditions (Rousseau, American transcendentalism) or a mere decorum for divine providence or human history (Hegel, Marx). However, a vitalist vision of nature, closer to the pre-Socratic one, got reborn at the same time, especially after Charles Darwin. Within the various uses of the word t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Death Valley
Death Valley is a desert valley in Eastern California, in the northern Mojave Desert, bordering the Great Basin Desert. It is thought to be the Highest temperature recorded on Earth, hottest place on Earth during summer. Death Valley's Badwater Basin is the point of lowest elevation in North America, at below sea level. It is east-southeast of Mount Whitney – the highest point in the contiguous United States, with an elevation of 14,505 feet (4,421 m). On the afternoon of July10, 1913, the National Weather Service, United States Weather Bureau recorded a high temperature of 134 °F (56.7 °C) at Furnace Creek, California, Furnace Creek in Death Valley, which stands as the Highest temperature recorded on Earth, highest ambient air temperature ever recorded on the surface of the Earth. This reading, however, and several others taken in that period are disputed by some modern experts. Lying mostly in Inyo County, California, near the border of California and Nevada, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocking Stone
Rocking stones (also known as logan stones or logans) are large Rock (geology), stones that are so finely balanced that the application of just a small force causes them to rock. Typically, rocking stones are residual corestones formed initially by spheroidal weathering and have later been exposed by erosion or glacial erratics left by retreating glaciers.Neuendorf, K.K.E., J.P. Mehl, Jr., and J.A. Jackson, eds. (2005) ''Glossary of Geology'' (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. Charles Rowland Twidale, Twidale, C.R., and J.R.V. Romani (2005) ''Landforms and Geology of Granite Terrains.'' A.A. Balkema Publishers Leiden, The Netherlands. 359 pp. Natural rocking stones are found throughout the world. A few rocking stones might be man-made megaliths. Name The word "logan" is probably derived from the word "log", which in the Cornish dialect of English means to rock. In some parts of the United Kingdom, rocking stones or logan stones are called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles Times
The ''Los Angeles Times'' is an American Newspaper#Daily, daily newspaper that began publishing in Los Angeles, California, in 1881. Based in the Greater Los Angeles city of El Segundo, California, El Segundo since 2018, it is the List of newspapers in the United States, sixth-largest newspaper in the U.S. and the largest in the Western United States with a print circulation of 118,760. It has 500,000 online subscribers, the fifth-largest among U.S. newspapers. Owned by Patrick Soon-Shiong and published by California Times, the paper has won over 40 Pulitzer Prizes since its founding. In the 19th century, the paper developed a reputation for civic boosterism and opposition to Trade union, labor unions, the latter of which led to the Los Angeles Times bombing, bombing of its headquarters in 1910. The paper's profile grew substantially in the 1960s under publisher Otis Chandler, who adopted a more national focus. As with other regional newspapers in California and the United Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Public Library Of Science
PLOS (for Public Library of Science; PLoS until 2012) is a nonprofit publisher of open-access journals in science, technology, and medicine and other scientific literature, under an open-content license. It was founded in 2000 and launched its first journal, ''PLOS Biology'', in October 2003. As of 2024, PLOS publishes 14 academic journals, including 7 journals indexed within the Science Citation Index Expanded, and consequently 7 journals ranked with an impact factor. PLOS journals are included in the Directory of Open Access Journals (DOAJ). PLOS is also a member of the Open Access Scholarly Publishers Association (OASPA), a participating publisher and supporter of the Initiative for Open Citations, and a member of the Committee on Publication Ethics (COPE). History The Public Library of Science began in 2000 with an online petition initiative by Nobel Prize winner Harold Varmus, formerly director of the National Institutes of Health and at that time director of Mem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boundary Layer
In physics and fluid mechanics, a boundary layer is the thin layer of fluid in the immediate vicinity of a Boundary (thermodynamic), bounding surface formed by the fluid flowing along the surface. The fluid's interaction with the wall induces a No-slip condition, no-slip boundary condition (zero velocity at the wall). The flow velocity then monotonically increases above the surface until it returns to the bulk flow velocity. The thin layer consisting of fluid whose velocity has not yet returned to the bulk flow velocity is called the velocity boundary layer. The air next to a human is heated, resulting in gravity-induced convective airflow, which results in both a velocity and thermal boundary layer. A breeze disrupts the boundary layer, and hair and clothing protect it, making the human feel cooler or warmer. On an aircraft wing, the velocity boundary layer is the part of the flow close to the wing, where viscosity, viscous forces distort the surrounding non-viscous flow. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
