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Independence Monument (Colorado)
Independence Monument is a sandstone pillar located in Colorado National Monument, in Mesa County of western Colorado, United States. This iconic 450-foot-high landmark is situated one mile southeast of the monument's visitor center, and west of the community of Grand Junction, where it towers above the floor of Monument Canyon and Wedding Canyon. It is a popular climbing destination, and can be seen from Rim Rock Drive. History John Otto first arrived in the Grand Junction area in 1906. He lived alone in the canyons and used a pick and shovel to carve out trails. Otto is remembered as Colorado National Monument's founder, and its first custodian. A fervent patriot, he named the rock features after great heroes and historic events, with Independence Monument still bearing the name he bestowed. John Otto made the first ascent of Independence Monument on June 14, 1911, flying Old Glory from the summit for Flag Day. That flag was presented to Otto by President William Howard T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorado
Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas to the east, and Oklahoma to the southeast. Colorado is noted for its landscape of mountains, forests, High Plains (United States), high plains, mesas, canyons, plateaus, rivers, and desert lands. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is the List of U.S. states and territories by area, eighth-largest U.S. state by area and the List of U.S. states and territories by population, 21st by population. The United States Census Bureau estimated the population of Colorado to be 5,957,493 as of July 1, 2024, a 3.2% increase from the 2020 United States census. The region has been inhabited by Native Americans in the United St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flag Day (United States)
Flag Day is a holiday celebrated on June 14 in the United States. It commemorates the adoption of the flag of the United States on June 14, 1777, by resolution of the Second Continental Congress. The Flag Resolution stated "That the flag of the thirteen United States be thirteen stripes, alternate red and white; that the union be thirteen stars, white in a blue field, representing a new constellation." Flag Day was first proposed in 1861 to rally support for the Union side of the American Civil War. In 1916, President Woodrow Wilson issued a Presidential proclamation (United States), presidential proclamation that designated June 14 as Flag Day. On August 3, 1949, National Flag Day was officially established by an Act of Congress. On June 14, 1937, Pennsylvania became the first state to celebrate Flag Day as a state holiday, beginning in the town of Rennerdale. New York Consolidated Laws designate the second Sunday in June as Flag Day, a state holiday. Flag Day is not an offici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precambrian
The Precambrian ( ; or pre-Cambrian, sometimes abbreviated pC, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon, which is named after Cambria, the Latinized name for Wales, where rocks from this age were first studied. The Precambrian accounts for 88% of the Earth's geologic time. The Precambrian is an informal unit of geologic time, subdivided into three eons ( Hadean, Archean, Proterozoic) of the geologic time scale. It spans from the formation of Earth about 4.6 billion years ago ( Ga) to the beginning of the Cambrian Period, about million years ago ( Ma), when hard-shelled creatures first appeared in abundance. Overview Relatively little is known about the Precambrian, despite it making up roughly seven-eighths of the Earth's history, and what is known has largely been discovered from the 1960s onwards. The Precambrian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinle Formation
The Chinle Formation is an Upper Triassic continental geological formation of fluvial, lacustrine, and palustrine to eolian deposits spread across the U.S. states of Nevada, Utah, northern Arizona, western New Mexico, and western Colorado. In New Mexico, it is often raised to the status of a geological group, the Chinle Group. Some authors have controversially considered the Chinle to be synonymous to the Dockum Group of eastern Colorado and New Mexico, western Texas, the Oklahoma panhandle, and southwestern Kansas. The Chinle Formation is part of the Colorado Plateau, Basin and Range, and the southern section of the Interior Plains.GEOLEX database entry for Chinle USGS (viewed 19 March 2006) A probable separate depositional basin within the Chinle is found in northwestern Colorado and northeaste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kayenta Formation
The Kayenta Formation is a geological formation in the Glen Canyon Group that is spread across the Colorado Plateau area of the United States, including northern Arizona, northwest Colorado, Nevada, and Utah. Originally suggested as being Sinemurian-Pliensbachian, but more recent Detrital zircon geochronology, dating of detrital zircons has yielded a depositional age of 183.7 ± 2.7 Ma, thus a Pliensbachian-Toarcian age is more likely. A previous depth work recovered a solid "Carixian" (Lower-Middle Pliensbachian) age from measurements done in the Tenney Canyon. More recent works have provided varied datations for the layers, with samples from Colorado and Arizona suggesting 197.0±1.5-195.2±5.5 Ma (Middle Sinemurian), while the topmost section is likely Toarcian or close in age, maybe even recovering terrestrial deposits coeval with the Toarcian Oceanic Anoxic Event. This last age assignation also correlated the Toarcian Vulcanism on the west Cordilleran Magmatic Arc, as the num ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluvial Processes
In geography and geology, fluvial sediment processes or fluvial sediment transport are associated with rivers and streams and the Deposition (geology), deposits and landforms created by sediments. It can result in the formation of ripple marks, ripples and dunes, in fractal-shaped patterns of erosion, in complex patterns of natural river systems, and in the development of floodplains and the occurrence of flash floods. Sediment moved by water can be larger than sediment moved by air because water has both a higher density and viscosity. In typical rivers the largest carried sediment is of sand and gravel size, but larger floods can carry Cobble (geology), cobbles and even boulders. When the stream or rivers are associated with glaciers, ice sheets, or ice caps, the term ''glaciofluvial'' or Fluvioglacial landform, ''fluvioglacial'' is used, as in periglacial flows and glacial lake outburst floods. Fluvial sediment processes include the sediment transport, motion of sediment and ero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caprock
Caprock or cap rock is a hard, resistant, and impermeable layer of rock that overlies and protects a reservoir of softer organic material, similar to the crust on a pie where the crust (caprock) prevents leakage of the soft filling (softer material). Caprocks consist of erosion-resistant rocks like sandstone, limestone, basalt, and evaporites that form landforms like mesas and buttes through differential erosion. It influences hydrology by creating waterfalls and aquifers, while also trapping hydrocarbons in petroleum reservoirs. Geological Characteristics Caprock is typically composed of erosion-resistant materials. Common caprock materials include stronlgy cemented sandstone, limestone, basalt, and evaporites like anhydrite, gypsum, or halite, which form over salt domes. The formation of caprock occurs through processes such as differential erosion, where resistant rocks remain as elevated features while softer rocks erode away; depositional processes, including chemica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartzose
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at . Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold. There are many different varieties of quartz, several of which are classified as gemstones. Since antiquity, varieties of quartz have been the most commonly used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cross-bedding
In geology, cross-bedding, also known as cross-stratification, is layering within a stratum and at an angle to the main bedding plane. The sedimentary structures which result are roughly horizontal units composed of inclined layers. The original depositional layering is tilted, such tilting not being the result of post-depositional deformation. Cross-beds or "sets" are the groups of inclined layers, which are known as cross-strata. Cross-bedding forms during deposition on the inclined surfaces of bedforms such as ripples and dunes; it indicates that the depositional environment contained a flowing medium (typically water or wind). Examples of these bedforms are ripples, dunes, antidunes, sand waves, hummocks, bars, and delta slopes.Collinson, J.D., Thompson, D.B., 1989, Sedimentary Structures (2nd ed): Academic Division of Unwin Hyman Ltd, Winchester, MA, XXX p. Environments in which water movement is fast enough and deep enough to develop large-scale bed forms fall into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fin (geology)
A fin is a geological formation that is a narrow, residual wall of hard sedimentary rock that remains standing after surrounding rock has been eroded away along parallel joints or fractures. Fins are formed when a narrow butte or plateau develops many vertical, parallel cracks. There are two main modes of following erosion. The first is when water flows along joints and fractures and opens them wider and wider, eventually causing erosion. The second is where the rock type (stratum) is harder and more erosion resistant than neighboring rocks, causing the weaker rock to fall away. Fins are considered an intermediary stage of many other erosional geologic features like windows, arches, and hoodoos. The formation of such features is a simplified four-step process. The first step is uplift that results in deep parallel, vertical fractures within the plateau. The second step is weathering and erosion that enlarges the fractures, producing fins. The third step is erosion attacking fins fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Athans
Peter Athans (born March 1, 1957) is one of the world's foremost high-altitude mountaineers. In 2008 he was celebrated for summiting Mount Everest seven times, and was given the moniker "Mr. Everest". His first attempt to climb Everest in 1985 via the West Ridge, and further attempts in 1986, 1987, and 1989 were unsuccessful, but he succeeded in summitting in 1990 as part of an expedition that included Scott Fischer and Wally Berg. Athans is one of several western Himalayan guides who have adopted Nepal as a second home, and who have taken up the cause of the Sherpa people and their culture. Rescues In 1996 he was a key participant in the rescue of several climbers during the May 1996 Everest Disaster. For his efforts the American Alpine Club awarded him and his partner Todd Burleson and Anatoli Boukreev the David A. Sowles Memorial Award. The next year, Athans removed the body of a friend - Bruce Herrod, a South African climber who had perished just weeks after the 1996 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beatrice Farnham
Beatrice Farnham (February 5, 1876 – February 19, 1979) was a 20th-century American artist and entrepreneur who was notable for her Native Americans in the United States, native-American-inspired fashion and handicrafts, her impassioned defense of tribal culture in Feature story, newspaper interviews, and her outdoor wedding ceremony with noted Colorado park ranger John Otto (park ranger), John Otto. Early life Beatrice was born February 5, 1876, in Jefferson, Maine. She was the daughter of Briggs C. Farnham, a farmer who was born in Maine and lived in South Weymouth, Massachusetts, and Minerva or Minnie C. Farnham. She was "brought up in a prim New England style in an ultra-conservative village" in a house that was more than a century old.1880 U.S. Cens/ref> In the 1880 census, the four-year-old girl was listed as Flover B. Farnham or Flora B. Farnham. She was graduated with Honours degree, high honors from the San Francisco Art Institute, Hopkins Art Institute in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
