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Marysvale
Marysvale is a town in Piute County, Utah, United States. The population was 356 at the 2020 census. Marysvale is a trail head for the Paiute ATV Trail. History A post office called Marysvale has been in operation since 1872. The town's name probably commemorates the Virgin Mary. In the late 1860s, silver ore was discovered in the Volcanic Series of Bullion Canyon and Mount Belknap, west of Marysvale in the Tushar Mountains. In 1889, gold was discovered. Then in 1949, uranium was discovered, prompting the United States Atomic Energy Commission to establish an ore purchasing station and field office in Marysvale. The uranium occurs as veins within quartz monzonite, granite and rhyolite, usually in the form of pitchblende, but also as umohoite, which was first identified at Marysvale. The pitchblende has been age dated to the Late Miocene. Total uranium production from the Marysvale area amounted to about 275,000 tons of 0.2 per cent U2O8. Geography According to the ...
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Paiute ATV Trail
The Paiute ATV Trail is a public all-terrain vehicle An all-terrain vehicle (ATV), also known as a light utility vehicle (LUV), a quad bike or quad (if it has four wheels), as defined by the American National Standards Institute (ANSI), is a vehicle that travels on low-pressure tires, has a seat ... trail system that is located in central Utah. It is managed by the Fishlake National Forest and the Richfield District of the Bureau of Land Management. The Paiute Trail has over 2000 miles of primary and designated side trails. The main loop of the trail is approximately 240 miles long and covers four counties, Piute County, Beaver County, Utah, Beaver County, Sevier County, Utah, Sevier County, and Millard County in Utah. The Paiute Trail has trail heads in Marysvale, Utah, Marysvale, Circleville, Utah, Circleville, Junction, Utah, Junction, Koosharem, Utah, Koosharem, Antimony, Utah, Antimony, Angle, Monroe, Utah, Monroe, Richfield, Utah, Richfield, Joseph, Utah, Joseph, Au ...
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Piute County, Utah
Piute County ( ) is a county in south-central Utah, United States. As of the 2020 United States census, the population was 1,438, making it the second-least populous county in Utah. The county seat is Junction, and the largest town is Circleville. History Paiute County was formed on January 16, 1865, with areas annexed from Beaver County. It was named for the Paiute tribe of Native Americans. Its defined boundaries were altered by adjustments between adjoining counties in 1866, in 1880, in 1892, and in 1931. It has retained its current configuration since 1931. By the 1860s, mining prospectors were pushing into central and southern Utah Territory, and several mining towns, such as Bullion and Webster, appeared. Mining activity had slowed by the 1900s, but gold mining (from lodes in Tushar Mountains) had produced 240,000 ounces of gold from 1868 through 1959. As the nation entered The Great War, a mine on the east Tushar Mountains producing potash and alumina became a nati ...
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Umohoite
Umohoite is a rare oxide and hydroxide mineral. The name of this mineral reflects its composition: uranyl (U), molybdate (Mo) and water (). Its chemical formula is (UO2)MoO4·2H2O. Umohoite's type location is in Marysvale Marysvale is a town in Piute County, Utah, United States. The population was 356 at the 2020 census. Marysvale is a trail head for the Paiute ATV Trail. History A post office called Marysvale has been in operation since 1872. The town's na ..., the mineral was first described by Paul F. Kerr and G. P. Brophy in 1953.Brophy, G.P. & Kerr, P.F. (1953)Hydrous uranium molybdate in Marysvale ore Annual Report June 30, 1952 - April 1, 1953 U.S.Atomic Energy Comm., RME-3046, 45-51. References {{Reflist Uranium minerals ...
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Mount Belknap (Utah)
Mount Belknap is a mountain summit in the Tushar Mountains of Utah, United States. Description Mount Belknap is set in the Fishlake National Forest on the boundary that Beaver County shares with Piute County. It ranks as the second-highest peak in the Tushar Mountains, second-highest in each county and 73rd-highest in the state. Precipitation runoff from the mountain drains into the Sevier River watershed via Blue Lake Creek, Fish Creek, and Beaver Creek. Topographic relief is significant as the summit rises over above Fish Creek in one mile (1.6 km). Mount Belknap is named after William Worth Belknap (1829–1890), the United States Secretary of War who served under President Ulysses S. Grant.Henry Gannett, ''The Origin of Certain Place Names in th ...
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Tushar Mountains
The Tushar Mountains are the third-highest mountain range in Utah after the Uinta Mountains and the La Sal Range. Located in the Fishlake National Forest, Delano Peak, 12,174 ft (3,711 m) NAVD 88, is the highest point in both Beaver County, Utah, Beaver and Piute County, Utah, Piute counties and has a prominence of 4,689 ft (1,429 m). Delano Peak is named for Columbus Delano (1809–1896), Secretary of the Interior, during the Grant administration. The Tushars receive an ample amount of snow annually even though they are situated within the rainshadow of the Sierra Nevada (California), Sierra Nevada range in California and the Snake Range located in Nevada. The main part of the range is in Beaver County, Utah, Beaver, Piute County, Utah, Piute and Sevier County, Utah, Sevier counties. The northwestern corner extends into the southeastern corner of Millard County, Utah, Millard County, and the southern end extends into the corners of Garfield County, Utah, Garfield and ...
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Quartz Monzonite
Quartz monzonite is an intrusive, felsic, igneous rock that has an approximately equal proportion of orthoclase and plagioclase feldspars. It is typically a light colored phaneritic (coarse-grained) to porphyritic granitic rock. The plagioclase is typically intermediate to sodic in composition, andesine to oligoclase. Quartz is present in significant amounts. Biotite and/or hornblende constitute the dark minerals. Because of its coloring, it is often confused with granite, but whereas granite contains more than 20% quartz, quartz monzonite is only 5–20% quartz. Rock with less than five percent quartz is classified as monzonite. A rock with more alkali feldspar is a syenite whereas one with more plagioclase is a quartz diorite.Classification of Igneous Rocks
The fine grained

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Uranium
Uranium is a chemical element; it has chemical symbol, 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 radioactive decay, radioactively decays, usually by emitting an alpha particle. The half-life of this decay varies between 159,200 and 4.5 billion years for different isotopes of uranium, isotopes, making them useful for dating the age of the Earth. 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 primordial nuclide, 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 notation#Parts-per expressions, parts per million in soil, ...
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United States Atomic Energy Commission
The United States Atomic Energy Commission (AEC) was an agency of the United States government established after World War II by the U.S. Congress to foster and control the peacetime development of atomic science and technology. President Harry S. Truman signed the McMahon/Atomic Energy Act on August 1, 1946, transferring the control of atomic energy from military to civilian hands, effective on January 1, 1947. This shift gave the members of the AEC complete control of the plants, laboratories, equipment, and personnel assembled during the war to produce the atomic bomb. An increasing number of critics during the 1960s charged that the AEC's regulations were insufficiently rigorous in several important areas, including radiation protection standards, nuclear reactor safety, plant siting, and environmental protection. By 1974, the AEC's regulatory programs had come under such strong attack that the U.S. Congress decided to abolish the AEC. The AEC was abolished by the Energ ...
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Vein (geology)
In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock. Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation. The hydraulic flow involved is usually due to hydrothermal circulation. Veins are classically thought of as being planar fractures in rocks, with the crystal growth occurring normal to the walls of the cavity, and the crystal protruding into open space. This certainly is the method for the formation of some veins. However, it is rare in geology for significant open space to remain open in large volumes of rock, especially several kilometers below the surface. Thus, there are two main mechanisms considered likely for the formation of veins: ''open-space filling'' and ''crack-seal growth''. Open space filling Open space filling is the hallmark of epithermal vein systems, such as a stockwork, in greisens or in certain skarn environments. For open space fillin ...
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Town
A town is a type of a human settlement, generally larger than a village but smaller than a city. The criteria for distinguishing a town vary globally, often depending on factors such as population size, economic character, administrative status, or historical significance. In some regions, towns are formally defined by legal charters or government designations, while in others, the term is used informally. Towns typically feature centralized services, infrastructure, and governance, such as municipal authorities, and serve as hubs for commerce, education, and cultural activities within their regions. The concept of a town varies culturally and legally. For example, in the United Kingdom, a town may historically derive its status from a market town designation or City status in the United Kingdom, royal charter, while in the United States, the term is often loosely applied to incorporated municipality, municipalities. In some countries, such as Australia and Canada, distinction ...
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Granite
Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous intrusions. These range in size from dike (geology), dikes only a few centimeters across to batholiths exposed over hundreds of square kilometers. Granite is typical of a larger family of ''granitic rocks'', or ''granitoids'', that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF diagram, QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) conta ...
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Pitchblende
Uraninite, also known as pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2 but because of oxidation typically contains variable proportions of U3O8. Radioactive decay of the uranium causes the mineral to contain oxides of lead and trace amounts of helium. It may also contain thorium and rare-earth elements. Overview Uraninite used to be known as pitchblende (from '' pitch'', because of its black color, and ''blende'', from ''blenden'' meaning "to deceive", a term used by German miners to denote minerals whose density suggested metal content, but whose exploitation, at the time they were named, was either unknown or not economically feasible). The mineral has been known since at least the 15th century, from silver mines in the Ore Mountains, on the German/Czech border. The type locality is the historic mining and spa town known as Joachimsthal, the modern-day Jáchymov, on the Czech side of the mountains, wh ...
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