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Nathrop, Colorado
Nathrop is an Unincorporated area, unincorporated town, a post office, and a Census-designated place, census-designated place (CDP) located in and governed by Chaffee County, Colorado, Chaffee County, Colorado, United States. The population was 288 at the 2020 United States Census, 2020 census. The Nathrop post office has the ZIP code 81236. History Nathrop was named for Charles Nachtrieb, owner of the townsite. In 1880, the Denver and Rio Grande Railroad built through Nathrop as part of their Tennessee Pass Line, Tennessee Pass line. The tracks were placed out of service in 1997, but Union Pacific, present-day owner of the line, may reach an agreement to reopen it. Geography The Nathrop CDP has an area of , all land. Ruby Mountain Ruby Mountain is a rhyolite outcrop located about one mile northeast of Nathrop. Small spessartite garnet crystals are found throughout the outcropping. Small pebbles of black obsidian referred to as "Apache tears" by collectors can also be found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Census-designated Place
A census-designated place (CDP) is a Place (United States Census Bureau), concentration of population defined by the United States Census Bureau for statistical purposes only. CDPs have been used in each decennial census since 1980 as the counterparts of incorporated places, such as self-governing city (United States), cities, town (United States), towns, and village (United States), villages, for the purposes of gathering and correlating statistical data. CDPs are populated areas that generally include one officially designated but currently unincorporated area, unincorporated community, for which the CDP is named, plus surrounding inhabited countryside of varying dimensions and, occasionally, other, smaller unincorporated communities as well. CDPs include small rural communities, Edge city, edge cities, colonia (United States), colonias located along the Mexico–United States border, and unincorporated resort and retirement community, retirement communities and their environs. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Princeton
Mount Princeton is a Elevation, high and Topographic prominence, prominent mountain summit of the Collegiate Peaks in the Sawatch Range of the Rocky Mountains of North America. The fourteener is located in San Isabel National Forest, southwest (Absolute bearing, bearing 225°) of the Buena Vista, Colorado, Town of Buena Vista in Chaffee County, Colorado, Chaffee County, Colorado, United States. The mountain was named in honor of Princeton University. Mountain While not one of the highest peaks of the Sawatch Range, Mount Princeton is one of the most dramatic, abruptly rising nearly above the Arkansas River valley in only 6 miles. Climbing The first recorded ascent was on July 17, 1877, at 12:30 pm by William Libbey of Princeton University. It is likely that various miners had climbed the peak earlier. The name ''Mount Princeton'' was in use as early as 1873, and the peak was most likely named by Henry Gannett, a Harvard graduate and chief topographer in a governmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Browns Canyon National Monument
Browns Canyon National Monument is a national monument in Chaffee County, Colorado, that was designated as such by President Barack Obama under the Antiquities Act on February 19, 2015. The site will be centered along the Arkansas River between Buena Vista and Salida. Browns Canyon is the most popular destination for whitewater rafting in the country, and is also known for its fishing and hiking. The monument will provide habitat protection for bighorn sheep, peregrine falcons, elk, and golden eagles. Designation of the monument was requested by numerous Colorado lawmakers, including Senators Michael Bennet and Mark Udall, Representative Joel Hefley and Governor John Hickenlooper. It was opposed by Representatives Ken Buck and Doug Lamborn, who objected to the president's use of executive action in declaring the monument. Lamborn also objected to the effect that the monument's creation would have on grazing, mineral and water rights; in response, the White House sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arkansas Headwaters Recreation Area
The Arkansas Headwaters Recreation Area (AHRA) is a state park in Colorado, U.S. The park is jointly administered by Colorado Parks and Wildlife, the Bureau of Land Management, and the United States Forest Service. The park's joint headquarters and visitor center is in Salida, Colorado. Geography The recreation area stretches along the Arkansas River for approximately from Leadville, Colorado to the Pueblo Reservoir near Pueblo West, Colorado. The area includes more than 25 developed recreation sites and fishing easements along the river adjacent to U.S. Highway 24 / U.S. Highway 285 and adjacent to U.S. Highway 50. The recreation area includes sections in and near the Colorado towns of Buena Vista, Salida, Cañon City and Florence. The recreation area includes parts of Browns Canyon National Monument, established in 2015. The national monument is accessible through the recreation area's Ruby Mountain and Hecla Junction river sites. In a stretch that includes the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpine Tunnel
Alpine Tunnel is a narrow gauge railroad tunnel located east of Pitkin, Colorado, on the former Denver, South Park and Pacific Railroad route from Denver to Gunnison. At an elevation of , it was the first tunnel constructed across the Continental Divide in Colorado and was the highest railroad tunnel in North America at the time of its construction in 1882. The line was abandoned less than 30 years later, in 1910, after a series of accidents and problems in and around the tunnel. Now the tunnel is sealed, and the remaining trackbed serves as a trail for hikers and bicyclists. History Location of the tunnel portals and establishing a center line of the bore were completed in December 1879. Construction took place from 1880–1881, by Cummings & Co. Construction company, and the tunnel was "holed through" on July 26, 1881. This was the highest and most expensive tunnel built up until that time. It is more than two miles (3 km) above sea level, with its highest point at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obsidian
Obsidian ( ) is a naturally occurring volcanic glass formed when lava extrusive rock, extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Produced from felsic lava, obsidian is rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. It is commonly found within the margins of rhyolite, rhyolitic lava flows known as obsidian flows. These flows have a high content of silicon dioxide, silica, giving them a high viscosity. The high viscosity inhibits the atomic diffusion, diffusion of atoms through the lava, which inhibits the first step (nucleation) in the formation of mineral crystals. Together with rapid cooling, this results in a natural glass forming from the lava. Obsidian is hard, Brittleness, brittle, and amorphous; it therefore Fracture (mineralogy)#Conchoidal fracture, fractures with sharp edges. In the past, it was used to manufacture cutting and piercing tools, and it has been used experimentally as s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garnet
Garnets () are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. Garnet minerals, while sharing similar physical and crystallographic properties, exhibit a wide range of chemical compositions, defining distinct species. These species fall into two primary solid solution series: the pyralspite series (pyrope, almandine, spessartine), with the general formula [Mg,Fe,Mn]3Al2(SiO4)3; and the ugrandite series (uvarovite, grossular, andradite), with the general formula Ca3[Cr,Al,Fe]2(SiO4)3. Notable varieties of grossular include Grossular#Hessonite, hessonite and tsavorite. Etymology The word ''garnet'' comes from the 14th-century Middle English word ''gernet'', meaning 'dark red'. It is borrowed from Old French ''grenate'' from Latin language, Latin ''granatus,'' from ''granum'' ('grain, seed'). This is possibly a reference to ''mela granatum'' or even ''pomum granatum'' ('pomegranate', ''Punica granatum''), a plant whose fruits conta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spessartite
Lamprophyres () are uncommon, small-volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks, and small intrusions. They are alkaline silica- undersaturated mafic or ultramafic rocks with high magnesium oxide, >3% potassium oxide, high sodium oxide, and high nickel and chromium. Lamprophyres occur throughout all geologic eras. Archaean examples are commonly associated with lode gold deposits. Cenozoic examples include magnesian rocks in Mexico and South America, and young ultramafic lamprophyres from Gympie in Australia with 18.5% MgO at ~250 Ma. Petrology Modern science treats lamprophyres as a catch-all term for ultrapotassic mafic igneous rocks which have primary mineralogy consisting of amphibole or biotite, and with feldspar in the groundmass. Lamprophyres are not amenable to classification according to modal proportions, such as the system QAPF, because of their peculiar mineralogy, nor compositional discrimination diagrams, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhyolite
Rhyolite ( ) is the most silica-rich of volcanic rocks. It is generally glassy or fine-grained (aphanitic) in texture (geology), texture, but may be porphyritic, containing larger mineral crystals (phenocrysts) in an otherwise fine-grained matrix (geology), groundmass. The mineral assemblage is predominantly quartz, sanidine, and plagioclase. It is the extrusive equivalent of granite. Its high silica content makes rhyolitic magma extremely viscosity, viscous. This favors explosive eruptions over effusive eruptions, so this type of magma is more often erupted as pyroclastic rock than as lava flows. Rhyolitic ash-flow tuffs are among the most voluminous of continental igneous rock formations. Rhyolitic tuff has been used extensively for construction. Obsidian, which is rhyolitic volcanic glass, has been used for tools from prehistoric times to the present day because it can be shaped to an extremely sharp edge. Rhyolitic pumice finds use as an abrasive, in concrete, and as a soil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
