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Twin Sisters (Colorado)
Twin Sisters is a mountain summit located in San Juan County, Colorado, United States. The lower west summit has an elevation of and 0.43 mile separates the pair. Twin Sisters is part of the San Juan Mountains range which is a subset of the Rocky Mountains, and is west of the Continental Divide. It is situated 7.5 miles southwest of the community of Silverton, on land managed by San Juan National Forest. It is set 5.5 miles north of Engineer Mountain, and 2.2 miles east of Rolling Mountain, the nearest higher neighbor. Other neighbors include Snowdon Peak seven miles to the southeast, and Golden Horn, 3.5 miles to the northwest. Topographic relief is significant as the north aspect rises above South Fork Mineral Creek in approximately 1.5 mile. The mountain's name, which has been officially adopted by the United States Board on Geographic Names, was in use in 1906 when Henry Gannett published it in ''A Gazetteer of Colorado''.Henry Gannett, ''Gaz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Juan County, Colorado
San Juan County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 705, making it the least populous county in Colorado. The county seat and the only incorporated municipality in the county is Silverton. The county name is the Spanish language name for " Saint John", the name Spanish explorers gave to a river and the mountain range in the area. With a mean elevation of 11,240 feet (3426 meters), San Juan County is the highest county in the United States. History Long before European settlement, the area was regularly explored by the Anasazi, and later the Utes, who hunted and lived in the San Juans during the summer. There is also speculation that Spanish explorers and fur traders ventured into the area in the 1600s and 1700s. Permanent settlement in the area surrounding present-day San Juan County began in 1860, near the end of the Colorado Gold Rush. These first settlers were a group of prospectors lead by Charles Baker ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topographic Relief
Terrain or relief (also topographical relief) involves the vertical and horizontal dimensions of land surface. The term bathymetry is used to describe underwater relief, while hypsometry studies terrain relative to sea level. The Latin word (the root of ''terrain'') means "earth." In physical geography, terrain is the lay of the land. This is usually expressed in terms of the elevation, slope, and orientation of terrain features. Terrain affects surface water flow and distribution. Over a large area, it can affect weather and climate patterns. Importance The understanding of terrain is critical for many reasons: * The terrain of a region largely determines its suitability for human settlement: flatter alluvial plains tend to have better farming soils than steeper, rockier uplands. * In terms of environmental quality, agriculture, hydrology and other interdisciplinary sciences; understanding the terrain of an area assists the understanding of watershed boundaries, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountains Of Colorado
This list includes significant mountain peaks and high points located in the United States arranged alphabetically by state, district, or territory. The highest peak or point in each state, district or territory is noted in bold. Significant mountain peaks and high points Alabama * Brindley Mountain * Cheaha Mountain, highest summit in the State of Alabama * Monte Sano Mountain *Capshaw Mountain *Dirtseller Mountain *Frog Mountain *Hawk Pride Mountain *Gunters Mountain * Sand Mountain (Alabama) *Keel Mountain (Alabama) *Halama Mountain Alaska * Afognak Mountain, summit of Afognak Island * Amak Volcano, active stratovolcano * Amherst Peak * Amulet Peak * Andy Simons Mountain * Annex Peak * Anvil Peak , active stratovolcano that forms the summit of Semisopochnoi Island * Arthur Peak * Asses Ears (Alaska) * Atna Peaks * Atuk Mountain , summit of St. Lawrence Island * Augustine Volcano, active lava dome that forms the summit of Augustine Island * Auke Mou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Juan Mountains (Colorado)
The San Juan Mountains is a high and rugged mountain range in the Rocky Mountains in southwestern Colorado and northwestern New Mexico. The area is highly mineralized (the Colorado Mineral Belt) and figured in the gold and silver mining industry of early Colorado. Major towns, all old mining camps, include Creede, Lake City, Silverton, Ouray, and Telluride. Large scale mining has ended in the region, although independent prospectors still work claims throughout the range. The last large scale mines were the Sunnyside Mine near Silverton, which operated until late in the 20th century and the Idarado Mine on Red Mountain Pass that closed down in the 1970s. Famous old San Juan mines include the Camp Bird and Smuggler Union mines, both located between Telluride and Ouray. The Summitville mine was the scene of a major environmental disaster in the 1990s when the liner of a cyanide-laced tailing pond began leaking heavily. Summitville is in the Summitville caldera, one of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountains Of San Juan County, Colorado
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animas River
Animas River (''On-e-mas''; es, Río de las Ánimas) is a river in the western United States, a tributary of the San Juan River, part of the Colorado River System. The Animas-La Plata Water Project was completed in 2015. The project pumps water over a low pass to fill a reservoir, Lake Nighthorse, in Ridges Basin to satisfy Southern Ute tribal water rights claims associated with the Colorado Ute Settlement Act amendments of 2000. Name Spanish explorer Juan Maria de Rivera of Santa Fe recorded the name "Rio de las Animas" (in English, River of Souls) in 1765. One theory is that the full name of the river was once "Rio de las Animas Perdidas" (River of Lost Souls) commemorating people who died in the river. A handful of commentators (3) have suggested that the origin of this river's name is confused name with the Purgatoire River of southeastern Colorado. Watershed The Animas River rises high in San Juan Mountains of Colorado at the confluence of the West and North fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface Runoff
Surface runoff (also known as overland flow) is the flow of water occurring on the ground surface when excess rainwater, stormwater, meltwater, or other sources, can no longer sufficiently rapidly infiltrate in the soil. This can occur when the soil is saturated by water to its full capacity, and the rain arrives more quickly than the soil can absorb it. Surface runoff often occurs because impervious areas (such as roofs and pavement) do not allow water to soak into the ground. Furthermore, runoff can occur either through natural or man-made processes. Surface runoff is a major component of the water cycle. It is the primary agent of soil erosion by water. The land area producing runoff that drains to a common point is called a drainage basin. Runoff that occurs on the ground surface before reaching a channel can be a nonpoint source of pollution, as it can carry man-made contaminants or natural forms of pollution (such as rotting leaves). Man-made contaminants in runoff i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subarctic Climate
The subarctic climate (also called subpolar climate, or boreal climate) is a climate with long, cold (often very cold) winters, and short, warm to cool summers. It is found on large landmasses, often away from the moderating effects of an ocean, generally at latitudes from 50° to 70°N, poleward of the humid continental climates. Subarctic or boreal climates are the source regions for the cold air that affects temperate latitudes to the south in winter. These climates represent Köppen climate classification ''Dfc'', ''Dwc'', ''Dsc'', ''Dfd'', ''Dwd'' and ''Dsd''. Description This type of climate offers some of the most extreme seasonal temperature variations found on the planet: in winter, temperatures can drop to below and in summer, the temperature may exceed . However, the summers are short; no more than three months of the year (but at least one month) must have a 24-hour average temperature of at least to fall into this category of climate, and the coldest month should a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köppen Climate Classification
The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notably in 1918 and 1936. Later, the climatologist Rudolf Geiger (1894–1981) introduced some changes to the classification system, which is thus sometimes called the Köppen–Geiger climate classification system. The Köppen climate classification divides climates into five main climate groups, with each group being divided based on seasonal precipitation and temperature patterns. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Gannett
Henry Gannett (August 24, 1846 – November 5, 1914) was an American geographer who is described as the "father of mapmaking in America."Evans, Richard Tranter; Frye, Helen M. (2009).History of the Topographic Branch (Division) (PDF). ''U.S. Geological Survey Circular''. 1341. . He was the chief geographer for the United States Geological Survey essentially from its founding until 1902. He was also a founding member and president of the National Geographic Society. Background Gannett was born in Bath, Maine, son of Hannah Trufant (nee Church) and Michael Farley Gannett. He attended local schools, before going to Harvard for college. He graduated with a B.S. from the Lawrence Scientific School of Harvard University in 1869 and received an M.E. at the Hooper Mining School (aka the Harvard University School of Mining and Practical Geology) in 1870. From 1870 to 1871, he was an assistant at the Harvard College Observatory. In 1871, he participated in a Harvard expedition to Spain t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Board On Geographic Names
The United States Board on Geographic Names (BGN) is a federal body operating under the United States Secretary of the Interior. The purpose of the board is to establish and maintain uniform usage of geographic names throughout the federal government of the United States. History On January 8, 1890, Thomas Corwin Mendenhall, superintendent of the US Coast and Geodetic Survey Office, wrote to 10 noted geographers "to suggest the organization of a Board made up of representatives from the different Government services interested, to which may be referred any disputed question of geographical orthography." President Benjamin Harrison signed executive order 28 on September 4, 1890, establishing the ''Board on Geographical Names''. "To this Board shall be referred all unsettled questions concerning geographic names. The decisions of the Board are to be accepted y federal departmentsas the standard authority for such matters." The board was given authority to resolve all unsettled q ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden Horn (Colorado)
Golden Horn is a mountain summit located on the shared boundary of San Juan County, Colorado, San Juan County with San Miguel County, Colorado, San Miguel County, in southwest Colorado, United States. It is situated nine miles west of the community of Silverton, Colorado, Silverton, on land managed by San Juan National Forest and Uncompahgre National Forest. Golden Horn is part of the San Juan Mountains which are a subset of the Rocky Mountains, and is west of the Continental Divide of the Americas, Continental Divide. It ranks as the 116th-highest peak in Colorado, and topographic relief is significant as the west aspect rises in approximately 1.5 mile. The mountain's name, which has been officially adopted by the United States Board on Geographic Names, was in use in 1906 when Henry Gannett published it in ''A Gazetteer of Colorado''.Henry Gannett, ''Gazetteer of Colorado'', 1906, US Government Printing Office, page 77. Climate According to the Köppen climate classification ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
