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Comstock Lode
The Comstock Lode is a lode of silver ore located under the eastern slope of Mount Davidson, a peak in the Virginia Range in Virginia City, Nevada (then western Utah Territory), which was the first major discovery of silver ore in the United States and named after American miner Henry Comstock. After the discovery was made public in 1859, it sparked a silver rush of prospectors to the area, scrambling to stake their claims. The discovery caused considerable excitement in California and throughout the United States, the greatest since the California Gold Rush in 1849. Mining camps soon thrived in the vicinity, which became bustling commercial centers, including Virginia City and Gold Hill. The Comstock Lode is notable not just for the immense fortunes it generated and the large role those fortunes had in the growth of Nevada and San Francisco, but also for the advances in mining technology that it spurred, such as square set timbering and the Washoe process for extracting silv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining On The Comstock
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can use the material. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Square Set Timbering
In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length adjacent sides. It is the only regular polygon whose internal angle, central angle, and external angle are all equal (90°), and whose diagonals are all equal in length. A square with vertices ''ABCD'' would be denoted . Characterizations A convex quadrilateral is a square if and only if it is any one of the following: * A rectangle with two adjacent equal sides * A rhombus with a right vertex angle * A rhombus with all angles equal * A parallelogram with one right vertex angle and two adjacent equal sides * A quadrilateral with four equal sides and four right angles * A quadrilateral where the diagonals are equal, and are the perpendicular bisectors of each other (i.e., a rhombus with equal diagonals) * A convex quadrilateral with successiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sluice
Sluice ( ) is a word for a channel controlled at its head by a movable gate which is called a sluice gate. A sluice gate is traditionally a wood or metal barrier sliding in grooves that are set in the sides of the waterway and can be considered as a bottom opening in a wall. Sluice gates are one of the most common hydraulic structures in controlling flow rate and water level in open channels such as rivers and canals. They also could be used to measure the flow. A water channel containing a sluice gate forms a type of lock to manage the water flow and water level. It can also be an open channel which processes material, such as a River Sluice used in gold prospecting or fossicking. A mill race, leet, flume, penstock or lade is a sluice channeling water toward a water mill. The terms sluice, sluice gate, knife gate, and slide gate are used interchangeably in the water and wastewater control industry. They are also used in wastewater treatment plants and to recover minerals in minin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cradle (mining)
A rocker box (also known as a cradle) is a gold mining implement for separating alluvial placer gold from sand and gravel which was used in placer mining in the 19th century. It consists of a high-sided box, which is open on one end and on top, and was placed on rockers. The inside bottom of the box is lined with riffles and usually a carpet (called Miner's Moss) similar to a sluice box. On top of the box is a classifier sieve (usually with half-inch or quarter-inch openings) which screens-out larger pieces of rock and other material, allowing only finer sand and gravel through. Between the sieve and the lower sluice section is a baffle, which acts as another trap for fine gold and also ensures that the aggregate material being processed is evenly distributed before it enters the sluice section. It sits at an angle and points towards the closed back of the box. Traditionally, the baffle consisted of a flexible apron or made of canvas or a similar material, which had a sag of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulch
In xeric lands, a gulch is a deep V-shaped valley formed by erosion. It may contain a small stream or dry creek bed and is usually larger in size than a gully. Sudden intense rainfall upstream may produce flash floods in the bed of the gulch. In eastern Canada, gulch refers to: *a narrow deep cove (Newfoundland) *a narrow saltwater channel (Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native Eng ...) See also * * , includes gorge. * * * * * * * References Erosion landforms Fluvial landforms Canyons and gorges Valleys {{Topography-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carson River
The Carson River is a northwestern List of Nevada rivers, Nevada river that empties into the Carson Sink, an endorheic basin. The main stem of the river is long although the addition of the East Fork makes the total length , traversing five counties: Alpine County, California, Alpine County in California and Douglas County, Nevada, Douglas, Storey County, Nevada, Storey, Lyon County, Nevada, Lyon, and Churchill County, Nevada, Churchill Counties in Nevada, as well as the Consolidated Municipality of Carson City, Nevada. The river is named for Kit Carson, who guided John C. Frémont's expedition westward up the Carson Valley and across Carson Pass in winter, 1844. The river made the National Priorities List (NPL) on October 30, 1990 as the Carson River Mercury Superfund site (CRMS) due to investigations that showed trace amounts of Mercury (element), mercury in the wildlife and watershed sediments. History Archaeological findings place the eastern border for the prehistoric Mart ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mormon
Mormons are a religious and cultural group related to Mormonism, the principal branch of the Latter Day Saint movement started by Joseph Smith in upstate New York during the 1820s. After Smith's death in 1844, the movement split into several groups following different leaders; the majority followed Brigham Young, while smaller groups followed Joseph Smith III, Sidney Rigdon, and James Strang. Most of these smaller groups eventually merged into the Community of Christ, and the term ''Mormon'' typically refers to members of the Church of Jesus Christ of Latter-day Saints (LDS Church), as today, this branch is far larger than all the others combined. People who identify as Mormons may also be independently religious, secular, and non-practicing or belong to other denominations. Since 2018, the LDS Church has requested that its members be referred to as "Latter-day Saints". Mormons have developed a strong sense of community that stems from their doctrine and history. One of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dayton, Nevada
Dayton is an unincorporated community and census-designated place (CDP) in Lyon County, Nevada, United States. The population was 15,153 at the 2020 census. Dayton is the first Nevada settlement and home to the oldest hotel in Nevada. History Dayton is at the western end of the Twenty-Six Mile Desert at a bend in the Carson River. Immigrants stopping there for water would decide whether to follow the river south or continue west, giving the location its first name, Ponderers Rest. In 1849, Abner Blackburn, while heading for California, discovered a gold nugget in nearby Gold Creek, a tributary of the Carson River. By 1850, placer miners settled at the mouth of Gold Cañon, working sand bars deposited over the millennia along the path of the creek. At first the settlement was just called "Gold Cañon" or "Gold Cañon Flat". Throughout the 1850s, Dayton served as the commercial hub for miners working in the canyon. In 1857 many Chinese miners came to the area to avoid mining tax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comstock Ore09
Comstock may refer to: Places *Comstock Northwest, Michigan, a census-designated place *Comstock Park, Michigan, a census-designated place and unincorporated community *Comstock Township, Michigan *Comstock, Minnesota, a city *Comstock Township, Marshall County, Minnesota *Comstock, Nebraska, a village *Comstock Township, Custer County, Nebraska *Comstock, North Dakota, an unincorporated community *Comstock, Texas, an unincorporated community *Comstock, Wisconsin, an unincorporated community *Comstock (crater), a lunar crater Ships *USS Comstock (LSD-19), USS ''Comstock'' (LSD-19), a dock landing ship of the United States Navy *USS Comstock (LSD-45), USS ''Comstock'' (LSD-45), a dock landing ship of the United States Navy Other uses *Comstock (surname), including a list of people with the name *Comstock Hall (Ithaca, New York), a building of Cornell University *Comstock High School, near Kalamazoo, Michigan *Comstock Lode and mines in Virginia City, Nevada *Comstock canned pie fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Outcrop
An outcrop or rocky outcrop is a visible exposure of bedrock or ancient superficial deposits on the surface of the Earth. Features Outcrops do not cover the majority of the Earth's land surface because in most places the bedrock or superficial deposits are covered by soil and vegetation and cannot be seen or examined closely. However, in places where the overlying cover is removed through erosion or tectonic uplift, the rock may be exposed, or ''crop out''. Such exposure will happen most frequently in areas where erosion is rapid and exceeds the weathering rate such as on steep hillsides, mountain ridges and tops, river banks, and tectonically active areas. In Finland, glacial erosion during the last glacial maximum (ca. 11000 BC), followed by scouring by sea waves, followed by isostatic uplift has produced many smooth coastal and littoral outcrops. Bedrock and superficial deposits may also be exposed at the Earth's surface due to human excavations such as quarrying and build ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andesite
Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, andesites are a component of the Martian crust. The name ''andesite'' is derived from the Andes mountain range, where this rock type is found in abundance. It was first applied by Christian Leopold von Buch in 1826. Description Andesite is an aphanitic (fine-grained) igneous rock that is intermediate in its content of silica and low in alkali metals. It has less than 20% quartz and 10% feldspathoid by volume, with at least 65% of the fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diorite
Diorite ( ) is an intrusive igneous rock formed by the slow cooling underground of magma (molten rock) that has a moderate content of silica and a relatively low content of alkali metals. It is intermediate in composition between low-silica (mafic) gabbro and high-silica ( felsic) granite. Diorite is found in mountain-building belts (''orogens'') on the margins of continents. It has the same composition as the fine-grained volcanic rock, andesite, which is also common in orogens. Diorite has been used since prehistoric times as decorative stone. It was used by the Akkadian Empire of Sargon of Akkad for funerary sculptures, and by many later civilizations for sculptures and building stone. Description Diorite is an intrusive igneous rock composed principally of the silicate minerals plagioclase feldspar (typically andesine), biotite, hornblende, and sometimes pyroxene. The chemical composition of diorite is intermediate, between that of mafic gabbro and felsic grani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
