|
Granite Dells
The Granite Dells is a geological feature north of Prescott, Arizona. The Dells consist of exposed bedrock and large boulders of granite that have eroded into an unusual lumpy, rippled appearance. Watson Lake (Arizona), Watson Lake and Willow Lake are small man-made reservoirs in this formation. The Peavine National Recreation Trail follows the former railbed of the Santa Fe, Prescott and Phoenix Railway through the Granite Dells. This winding portion of the railroad was known as the "Peavine" because its twisting curves resembled that of a pea vine. It connects to the Iron King Trail, which follows the route of the old Prescott & Eastern Railroad through the eastern Granite Dells. Both are rail trail conversions. Geology The precambrian''Roadside Geology of Arizona,'' p. 168. Dells' granite has been theoretically dated at 1.4 billion years old. Its pluton was intruded at a depth of around one or two miles (1.6 to 3.2 km). These cover rocks have since been eroded away. Weathe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watson Lake 2
Watson may refer to: Companies * Actavis, a pharmaceutical company formerly known as Watson Pharmaceuticals * A.S. Watson Group, retail division of Hutchison Whampoa * Thomas J. Watson Research Center, IBM research center * Watson Systems, maker of shopping trolleys * A. J. Watson, IndyCar roadster chassis constructor * Watsons Water, a bottled water company in Hong Kong Computing * Watson (computer), an IBM supercomputer which won the game show ''Jeopardy!'' * Dr. Watson (debugger), the internal debugger for the Windows platform * Intellext Watson, an application for the Windows platform * Karelia Watson, an application for the Macintosh platform Name *Watson (surname) *Watson (given name) Fictional characters * Dr. Watson, a character in ''Sherlock Holmes'' stories * Mary Jane Watson, a Spider-Man character * Esme Watson, a character in Australian television program ''A Country Practice'' Places ;Antarctica * Watson Peninsula, South Orkney Islands ;Australia * Watson, Austra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precambrian
The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon, which is named after Cambria, the Latinised name for Wales, where rocks from this age were first studied. The Precambrian accounts for 88% of the Earth's geologic time. The Precambrian is an informal unit of geologic time, subdivided into three eons ( Hadean, Archean, Proterozoic) of the geologic time scale. It spans from the formation of Earth about 4.6 billion years ago ( Ga) to the beginning of the Cambrian Period, about million years ago ( Ma), when hard-shelled creatures first appeared in abundance. Overview Relatively little is known about the Precambrian, despite it making up roughly seven-eighths of the Earth's history, and what is known has largely been discovered from the 1960s onwards. The Precambrian fossil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radon
Radon is a chemical element with the symbol Rn and atomic number 86. It is a radioactive, colourless, odourless, tasteless noble gas. It occurs naturally in minute quantities as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into various short-lived radioactive elements and lead. Radon itself is the immediate decay product of radium. Its most stable isotope, 222Rn, has a half-life of only 3.8 days, making it one of the rarest elements. Since thorium and uranium are two of the most common radioactive elements on Earth, while also having three isotopes with half-lives on the order of several billion years, radon will be present on Earth long into the future despite its short half-life. The decay of radon produces many other short-lived nuclides, known as "radon daughters", ending at stable isotopes of lead. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranium
Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all isotopes of uranium are unstable; the half-lives of its naturally occurring isotopes range between 159,200 years and 4.5 billion years. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite. In nature, uranium is found as uranium-238 (99. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yavapai College
Yavapai College is a public community college in Yavapai County, Arizona. The main campus is in Prescott, with locations in Clarkdale, Prescott Valley, Chino Valley and Sedona. History Yavapai College was established in 1965 by means of a countywide election. In the four years that followed, a board was appointed, a bond was passed, college personnel were hired, and curricula were established. The first classes were held in fall 1969. In February 1970, the college district dedicated its first buildings in Prescott on a site that was once part of Fort Whipple, the military base constructed in 1864 to provide security and protection for the territorial capital. Campus Yavapai College offers on-campus housing at the Prescott Campus in the two residence halls: Marapai and Kachina. The Rider Diner offers several cafeteria style meals seven days a week. The Common Grounds café located in the Library on the Prescott Campus offers light meals and a wide selection of coffee. Yavap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spheroidal Weathering
Spheroidal weathering is a form of chemical weathering that affects jointed bedrock and results in the formation of concentric or spherical layers of highly decayed rock within weathered bedrock that is known as '' saprolite.'' When saprolite is exposed by physical erosion, these concentric layers peel (spall) off as concentric shells much like the layers of a peeled onion. Within saprolite, spheroidal weathering often creates rounded boulders, known as ''corestones'' or ''woolsack'', of relatively unweathered rock. Spheroidal weathering is also called onion skin weathering, concentric weathering, spherical weathering, or woolsack weathering.Fairbridge, RW (1968) ''Spheroidal Weathering.'' in RW Fairbridge, ed., pp. 1041–1044, The Encyclopedia of Geomorphology, Encyclopedia of Earth Sciences, vol. III. Reinhold Book Corporation, New York, New York. Ollier, C.D. (1971). ''Causes of spheroidal weathering. ''Earth-Science Reviews 7:127–141.Neuendorf, KKE, JP Mehl Jr., and JA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joint (geology)
A rock in Abisko fractured along existing joints possibly by mechanical frost weathering A joint is a break (fracture) of natural origin in a layer or body of rock that lacks visible or measurable movement parallel to the surface (plane) of the fracture ("Mode 1" Fracture). Although joints can occur singly, they most frequently appear as joint sets and systems. A ''joint set'' is a family of parallel, evenly spaced joints that can be identified through mapping and analysis of their orientations, spacing, and physical properties. A ''joint system'' consists of two or more intersecting joint sets. The distinction between joints and faults hinges on the terms ''visible'' or ''measurable,'' a difference that depends on the scale of observation. Faults differ from joints in that they exhibit visible or measurable lateral movement between the opposite surfaces of the fracture ("Mode 2" and "Mode 3" Fractures). Thus a joint may be created by either strict movement of a rock la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pluton
In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and compositions, illustrated by examples like the Palisades Sill of New York and New Jersey; the Henry Mountains of Utah; the Bushveld Igneous Complex of South Africa; Shiprock in New Mexico; the Ardnamurchan intrusion in Scotland; and the Sierra Nevada Batholith of California. Because the solid country rock into which magma intrudes is an excellent insulator, cooling of the magma is extremely slow, and intrusive igneous rock is coarse-grained (phaneritic). Intrusive igneous rocks are classified separately from extrusive igneous rocks, generally on the basis of their mineral content. The relative amounts of quartz, alkali feldspar, plagioclase, and feldspathoid is particularly important in classifying intrusive igneous rocks. Intrusions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rail Trail
A rail trail is a shared-use path on railway right of way. Rail trails are typically constructed after a railway has been abandoned and the track has been removed, but may also share the right of way with active railways, light rail, or streetcars (rails with trails), or with disused track. As shared-use paths, rail trails are primarily for non-motorized traffic including pedestrians, bicycles, horseback riders, skaters, and cross-country skiers, although snowmobiles and ATVs may be allowed. The characteristics of abandoned railways—gentle grades, well-engineered rights of way and structures (bridges and tunnels), and passage through historical areas—lend themselves to rail trails and account for their popularity. Many rail trails are long-distance trails, while some shorter rail trails are known as greenways or linear parks. Rail trails around the world Americas Bermuda The Bermuda Railway ceased to operate as such when the only carrier to exist in Bermuda folded in 1948. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dells SW01
Dell is a computer design-and-manufacturing company. Dell, Dells, or The Dell also may refer to: Geography * Dell (landform), a small valley * Dell, Arkansas, a town * Dell, Minnesota, an unincorporated community * Dell, Missouri, an unincorporated community * Dell, Montana, an unincorporated community * The Dell, Leamington Spa, a park in Warwickshire, England People and fictional characters * Dell (name), a surname, given name and nickname (including a list of people and fictional characters with the name) * Michael Dell, founder and Dell Technologies Businesses * Dell Technologies, parent company of Dell Inc. * Dell Publishing, now an imprint of Random House ** Dell Comics, the comic-book arm (1929-1974) ** Dell Magazines, the magazine arm Buildings * Dell Diamond, a minor league baseball stadium in Round Rock, Texas * The Dell, Kingussie, a shinty stadium, home of Kingussie Camanachd in Scotland * The Dell, Southampton, former home of Southampton F.C. * Falmouth Tow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prescott & Eastern Railroad
The Prescott and Eastern Railroad (P&E) was a non-operating subsidiary of the Santa Fe, Prescott and Phoenix Railway (SFP&P) in Arizona. The 26.4 mile (42.5 km) common carrier railroad was built to serve the mines in the region. The railroad built from a connection with the SFP&P at Entro and extended south to Poland Junction and terminated at Mayer. At Poland Junction and Mayer the P&E connected with the Bradshaw Mountain Railroad, also a non-operating subsidiary of the SFP&P. After various mergers the P&E was merged into the Atchison, Topeka and Santa Fe Railway. The line was later abandoned by the Santa Fe Railway. History The railroad was incorporated on September 14, 1897. It commenced grading from the SFP&P connection at Entro (northeast of Prescott) on March 10, 1898. On September 30, 1898, the 26.4 mile (42.5 km) line was completed. On December 30, 1911, the P&E was merged into the California, Arizona and Santa Fe Railway, a non-operating subsidiary ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Fe, Prescott And Phoenix Railway
The Santa Fe, Prescott and Phoenix Railway (SFP&P) was a common carrier railroad that later became an operating subsidiary of the Atchison, Topeka and Santa Fe Railway in Arizona. At Ash Fork, Arizona, the SFP&P connected with Santa Fe's operating subsidiary, the Atlantic & Pacific Railroad mainline, that ran from California to Chicago. The SFP&P's line extended the Santa Fe Railway south into Phoenix. The SFP&P extended another to the east from Phoenix to Florence and Winkelman via the Phoenix and Eastern Railroad (which would become a Southern Pacific Railroad subsidiary in 1907). The SFP&P also served several mines in the Prescott area, including the Derby Mine by way of the Summit (flag) Station at 'Prieta' in the Sierra Prieta range, through its various subsidiary railroads. On December 28, 1911, the line was merged into Atchison, Topeka and Santa Fe Railway's non-operating subsidiary (paper railroad) of the California, Arizona and Santa Fe Railway. Today the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
