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Lemhi Pass
Lemhi Pass is a high mountain pass in the Beaverhead Mountains, part of the Bitterroot Range in the Rocky Mountains and within Salmon-Challis National Forest. The pass lies on the Montana-Idaho border on the continental divide, at an elevation of above sea level. It is accessed via Lemhi Pass Road in Montana, and the Lewis and Clark Highway in Idaho, both dirt roads. Warm Springs Road, which roughly follows the divide in Montana, passes just west of the pass's high point. History The pass gained importance in the 18th century, when the Lemhi Shoshone acquired horses and used the route to travel between the two main parts of their homeland.Idaho State Historical Society Reference Series No. 280 From the time of the |
Lemhi County, Idaho
Lemhi County is a county located in the U.S. state of Idaho. As of the 2020 census, the population was 7,974. The largest city and county seat is Salmon. The county was established in 1869, named after Fort Lemhi (or Limhi), a remote Mormon missionary settlement from 1855 to 1858 in Bannock and Shoshone territory. Traffic signals *Main (Hwy 28) and Challis (Hwy 93), Salmon *Main (Hwy 93) and Church, Salmon Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.1%) is water. It is the fourth-largest county in Idaho by area. The highest point is Bell Mountain at above sea level, and the lowest point is the Salmon River as it exits on the county's western border with Idaho County at approximately . The river cuts through the center of Lemhi County before turning west. The county's eastern border with Beaverhead County, Montana, is the Continental Divide. Adjacent counties *Idaho County, Idaho – northwest/Pacific Time border ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lewis And Clark Expedition
The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchase. The Corps of Discovery was a select group of U.S. Army and civilian volunteers under the command of Captain Meriwether Lewis and his close friend Second Lieutenant William Clark. Clark and 30 members set out from Camp Dubois, Illinois, on May 14, 1804, met Lewis and ten other members of the group in St. Charles, Missouri, then went up the Missouri River. The expedition crossed the Continental Divide of the Americas near the Lemhi Pass, eventually coming to the Columbia River, and the Pacific Ocean in 1805. The return voyage began on March 23, 1806, at Fort Clatsop, Oregon, and ended on September 23 of the same year. President Thomas Jefferson commissioned the expedition shortly after the Louisiana Purchase in 1803 to explore and to map the newly acquired territory, to find a pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rare-earth Elements
The rare-earth elements (REE), also called the rare-earth metals or (in context) rare-earth oxides or sometimes the lanthanides (yttrium and scandium are usually included as rare earths), are a set of 17 nearly-indistinguishable lustrous silvery-white soft heavy metals. Compounds containing rare earths have diverse applications in electrical and electronic components, lasers, glass, magnetic materials, and industrial processes. Scandium and yttrium are considered rare-earth elements because they tend to occur in the same ore deposits as the lanthanides and exhibit similar chemical properties, but have different electronic and magnetic properties. These metals tarnish slowly in air at room temperature and react slowly with cold water to form hydroxides, liberating hydrogen. They react with steam to form oxides, and at elevated temperature (400°C) ignite spontaneously. These elements and their compounds have no biological function other than in several specialized enzymes, su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thorium
Thorium is a weakly radioactive metallic chemical element with the symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately soft and malleable and has a high melting point. Thorium is an electropositive actinide whose chemistry is dominated by the +4 oxidation state; it is quite reactive and can ignite in air when finely divided. All known thorium isotopes are unstable. The most stable isotope, 232Th, has a half-life of 14.05 billion years, or about the age of the universe; it decays very slowly via alpha decay, starting a decay chain named the thorium series that ends at stable 208 Pb. On Earth, thorium and uranium are the only significantly radioactive elements that still occur naturally in large quantities as primordial elements. Thorium is estimated to be over three times as abundant as uranium in the Earth's crust, and is chiefly refined from monazite sands as a by-product of extracti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lanthanide
The lanthanide () or lanthanoid () series of chemical elements comprises the 15 metallic chemical elements with atomic numbers 57–71, from lanthanum through lutetium. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare-earth elements or rare-earth metals. The informal chemical symbol Ln is used in general discussions of lanthanide chemistry to refer to any lanthanide. All but one of the lanthanides are f-block elements, corresponding to the filling of the 4f electron shell. There is some dispute on whether lanthanum or lutetium is a d-block element, but lutetium is usually considered so by those who study the matter; it is included due to its chemical similarities with the other 14. All lanthanide elements form trivalent cations, Ln3+, whose chemistry is largely determined by the ionic radius, which decreases steadily from lanthanum to lutetium. These elements are called lanthanides because the elements i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Historic Landmark
A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500 (~3%) of over 90,000 places listed on the country's National Register of Historic Places are recognized as National Historic Landmarks. A National Historic Landmark District may include contributing properties that are buildings, structures, sites or objects, and it may include non-contributing properties. Contributing properties may or may not also be separately listed. Creation of the program Prior to 1935, efforts to preserve cultural heritage of national importance were made by piecemeal efforts of the United States Congress. In 1935, Congress passed the Historic Sites Act, which authorized the Interior Secretary authority to formally record and organize historic properties, and to designate properties as having "national historical significance", and gave the Nation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bannock Pass
Bannock Pass is a high mountain pass in the Beaverhead Mountains, part of the Bitterroot Range in the Rocky Mountains. The pass lies on the Montana-Idaho border on the Continental Divide, at an elevation of above sea level Height above mean sea level is a measure of the vertical distance (height, elevation or altitude) of a location in reference to a historic mean sea level taken as a vertical datum. In geodesy, it is formalized as ''orthometric heights''. The comb .... The pass is crossed by a road (Idaho State Highway 29 and Montana Secondary Highway 324) from Leadore, Idaho to Dillon, Montana. Bannock Pass should not be confused with the similarly named Bannack Pass, about to the southeast, which is also in the Beaverhead Mountains, on the Montana-Idaho border, and on the Continental Divide, and which has virtually the same elevation (). History Bannock Pass is named for the Bannock (tribe), Bannock Native American people. In 1909 and 1910 the Gilmore and Pittsburgh Ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gilmore And Pittsburgh Railroad
The Gilmore and Pittsburgh Railroad (G&P), now defunct, was an American railroad located in southwestern Montana and east-central Idaho. Constructed in 1909 and 1910 between Armstead, Montana, and Salmon, Idaho, the G&P served mining and agricultural areas in Lemhi County, Idaho, and Beaverhead County, Montana. The line was financially backed by the Northern Pacific Railway (NP) and later became its subsidiary. Never financially successful, the G&P ceased operations in 1939, and the railroad was dismantled the following year. Planning and construction During the first decade of the 20th century, Lemhi County, in the remote Salmon River country of central Idaho, was seeing both increased agricultural development and substantial, renewed mining activity. At that time, the area was part of one of the largest contiguous blocks of land not served by a railroad and, consequently, there was significant interest in the prospect of building a railway line to serve the region. The desir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salmon River (Idaho)
The Salmon River, also known as "The River of No Return", is a river located in the U.S. state of Idaho in the western United States. It flows for through central Idaho, draining a rugged, thinly populated watershed of . The river drops more than from its headwaters, near Galena Summit above the Sawtooth Valley in the Sawtooth National Recreation Area, to its confluence with the Snake River. Measured at White Bird, its average discharge is . The Salmon River is the longest undammed river in the contiguous United States and the longest within a single state outside Alaska. Settlements located along the Salmon River include Stanley, Clayton, Challis, Salmon, Riggins, and White Bird. Redfish Lake and Little Redfish Lake, which flow into the river via Redfish Lake Creek, are the termini of the longest Pacific sockeye salmon migration in North America. The lower half of the river provides the time zone boundary for the state, with northern Idaho on Pacific Time an ... [...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] |
Fort Lemhi
Fort Lemhi was a mission approximately two miles (3 km) north of present-day Tendoy, Idaho, occupied by Mormon missionaries from 1855 to 1858. Approximately twenty-seven Mormon men left the Salt Lake Valley on May 18, 1855, as instructed by Brigham Young with Thomas S. Smith serving as the leader of this group and George Washington Hill as their main Shoshonean language interpreter. The party reached the Salmon River valley (then in Oregon Territory) on May 27 and selected a permanent site for its mission on June 15, 1855. The mission was named Fort Limhi for King Limhi who was one of the kings cited in the Book of Mormon. In Mormon scripture, King Limhi organized an expedition that lasted 22 days, the same duration it required the Mormon missionaries to reach the Salmon River Country. Consequently, they named their mission after King Limhi, and Limhi eventually became "Lemhi" . The community grew to over 200 people. The settlers brought stock raising and irrigated farming t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Pass (Wyoming)
South Pass (elevation and ) is the collective term for two mountain passes on the American Continental Divide, in the Rocky Mountains in southwestern Wyoming. It lies in a broad high region, wide, between the nearly Wind River Range to the north and the over Oregon Buttes and arid, saline near-impassible Great Divide Basin to the south. The Pass lies in southwestern Fremont County, approximately SSW of Lander. Though it approaches a mile and a half high, South Pass is the lowest point on the Continental Divide between the Central and Southern Rocky Mountains. The passes furnish a natural crossing point of the Rockies. The historic pass became the route for emigrants on the Oregon, California, and Mormon trails to the West during the 19th century. It was designated as a U.S. National Historic Landmark on January 20, 1961. History Though well known to Native Americans, South Pass was first traversed in 1812 by European American explorers who were seeking a safer way to retur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
