NationMaster - Encyclopedia: Mount McLoughlin

Mount McLoughlin is a stratovolcano in the southern Oregon part of the Cascade Range. The mountain is north of Mount Shasta, south of Crater Lake, and west of Klamath Lake. The volcano was originally called Mount Pitt but was renamed after John McLoughlin, an official of the Hudson's Bay Company. United States Geological Survey photo of Mount McLoughlin Source URL: http://vulcan. ... A topographical summit is a point on a surface which is higher in elevation than all points immediately adjacent to it. ... Official language(s) None Capital Salem Largest city Portland Area - Total - Width - Length - % water - Latitude - Longitude Ranked 9th 255,026 kmÂ² 420 km 580 km 2. ... The most general definition of a mountain range is a group of mountains bordered by lowlands. ... Mount Adams in Washington The Cascade Range is a mountainous region famous for its chain of tall volcanoes called the High Cascades that run north-south along the west coast of North America from British Columbia to the Shasta Cascade area of northern California. ... Map of Earth showing lines of latitude (horizontally) and longitude (vertically); large version (pdf) The geographic (earth-mapping) coordinate system expresses every horizontal position on Earth by two of the three coordinates of a spherical coordinate system which is aligned with the spin axis of the Earth. ... Example of a topographic map with contour lines Topographic maps, also called contour maps, topo maps or topo quads (for quadrangles), are maps that show topography, or land contours, by means of contour lines. ... The United States Geological Survey (USGS) is a scientific agency of the United States government. ... Mountains can be characterized in several ways. ... A stratovolcano is a tall, conical mountain (volcano) composed of both hardened lava and volcanic ash. ... // The geological time scale is used by geologists and other scientists to describe the timing and relationships between events that have occurred during the history of the Earth. ... Eruption redirects here. ... In climbing, a first ascent (FA) is the first climb to reach the top of a mountain, or the first to follow a particular climbing route. ... Southern and northern Mount Everest climbing routes as seen from the International Space Station. ... Beautiful natural scenes are common hiking destinations Hiking is a form of walking, undertaken with the specific purpose of exploring and enjoying the scenery. ... A stratovolcano is a tall, conical mountain (volcano) composed of both hardened lava and volcanic ash. ... Official language(s) None Capital Salem Largest city Portland Area - Total - Width - Length - % water - Latitude - Longitude Ranked 9th 255,026 kmÂ² 420 km 580 km 2. ... Mount Adams in Washington The Cascade Range is a mountainous region famous for its chain of tall volcanoes called the High Cascades that run north-south along the west coast of North America from British Columbia to the Shasta Cascade area of northern California. ... Mount McKinley (Denali) in Alaska (USA) has the largest visible base-to-summit elevation difference on Earth. ... Mount Shasta, a 14,162-foot (4,322 m) stratovolcano, is the second-highest peak in the Cascade Range and the second-highest peak in California outside of the Sierra Nevada [1]. The mountain stands 10,000 feet (3,000 m) above the surrounding area and has an estimated volume... [[Imagine:Kyle Webber and his three nips in winter with your mom. ... Klamath Lake is a large freshwater body located in Klamath County Oregon, a small distance south of Crater Lake and close to Klamath Falls[1]. Upper Klamath Lake, at approximately 30 miles long and as much as 8 miles wide at poins is the largest body of freshwater west of... Eruption redirects here. ... John McLoughlin (NSHC statue) Dr. John McLoughlin (pronounced mc-lock-lin, October 19, 1784 – September 3, 1857), the Father of Oregon, was a fur trader and early settler in the Oregon Country in the Pacific Northwest. ... The Hudsons Bay Company (HBC. TSX: HBC) is the oldest commercial corporation in North America and is one of the oldest in the world. ...

Mount McLoughlin has a number of variant names, including Big Butte, M'laiksini Yaina, Mount Pit, Mount Pitt, Mount Shasty (although this name was applied to Mount Shasta to the south by the 1841 Wilkes Expedition), and Snowy Butte.

Geology

Except for a short monograph written by Arthur B. Emmons in 1886, little was known about McLoughlin's geology until the 1970s, Much of what is known about the volcano's geology comes from LeRoy Maynard of the University of Oregon's Center for Volcanology. 1886 (MDCCCLXXXVI) is a common year starting on Friday (click on link to calendar) // Events January 18 - Modern field hockey is born with the formation of The Hockey Association in England. ... The 1970s decade refers to the years from 1970 to 1979, inclusive. ... The University of Oregon (UO) is a public university located in Eugene, Oregon. ...

McLoughlin went through three or four stages of development and stopped growing some time before the current glaciation started 25,000 years ago. A glaciation (a created composite term meaning Glacial Period, referring to the Period or Era of, as well as the process of High Glacial Activity), often called an ice age, is a geological phenomenon in which massive ice sheets form in the Arctic and Antarctic and advance toward the equator. ...

The first known stage of the volcano's growth was explosive and built a large cinder cone from a single vent that may have reached the unusual height of 3000 feet (~900 meters) and may fill one third of McLoughlin's present interior (a steep-sided pre-existing shield volcano may exist within the cinder cone, thus explaining its extreme height). Some lava is associated with this stage but is confined to the lower parts of the cinder cone (this is common for cinder cones). McLoughlin's second cone-building stage was characterized by large andesite lava flows that poured out of a summit crater and in time buried the cinder cone. The volcano's third stage of development consisted of floods of blocky andesite lava erupting from below the summit and more fluid lavas erupting from basal fissures mostly confined to the south slope. North and South Squaw Tips on McLoughlin's west flank now mark the site of the two major blocky flow vents (there were two smaller vents). The entire third stage is thought to have happened in the Holocene (after the last ice age) due to a general lack of weathering and fresh appearance of the solidified lava. Puâ€˜u â€˜ÅŒâ€˜Å, a cinder-and-spatter cone on Kilauea, Hawaii Volcanic cones are among the simplest volcano formations. ... Mauna Kea, a shield volcano, on the Island of Hawaiâ€˜i with a light dusting of snow. ... Look up lava, Aa, and pahoehoe in Wiktionary, the free dictionary. ... A sample of andesite (dark groundmass) with amygdaloidal vesicules filled with zeolite. ... The Holocene epoch is a geological period that extends from the present back about 10,000 radiocarbon years. ... Variations in CO2, temperature and dust from the Vostok ice core over the last 400 000 years For the animated movie, see Ice Age (movie). ... Weathering is the process of disintegration of rocks, soils and their minerals through natural, chemical, and biological processes. ...

During the last ice age a large ice cap buried most of the High Cascades and McLoughlin marked the southern terminus of this structure. The ice cap was 200 to 300 feet (60 to 90 meters) thick where it touched McLoughlin. A large ice age glacier on the northeast side of the volcano severely eroded that part of the mountain, making an asymmetrical cone (a cirque glacier occupied part of the depression until early in the 20th century). The volcano's crest is located south of the central vent and its crater has long since been eroded away (along with ~500 feet, ~150 meters of its former height). United States Geological Survey photo of Mount McLoughlin Source URL: http://vulcan. ... United States Geological Survey photo of Mount McLoughlin Source URL: http://vulcan. ... An ice cap is a dome-shaped water ice mass that covers less than 50,000 kmÂ² of land area (usually covering a highland area). ... Aletsch glacier, Switzerland A glacier is a large, long-lasting river of ice that is formed on land and moves in response to gravity. ... Severe soil erosion in a wheat field near Washington State University, USA. Erosion is the displacement of solids (soil, mud, rock, and other particles) by the agents of wind, water, ice, movement in response to gravity, or living organisms (in the case of bioerosion). ... A cirque is an amphitheatre-like valley of glacial origin, formed by glacial erosion at the head of the glacier. ... (19th century - 20th century - 21st century - more centuries) Decades: 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s As a means of recording the passage of time, the 20th century was that century which lasted from 1901–2000 in the sense of the Gregorian calendar (1900–1999 in the...

External links

Categories: Stratovolcanoes | Cascade Range | Mountains of Oregon | Volcanoes of Oregon Mount Adams in Washington The Cascade Range is a mountainous region famous for its chain of tall volcanoes called the High Cascades that run north-south along the west coast of North America from British Columbia to the Shasta Cascade area of northern California. ... Image File history File linksMetadata Mount_Rainier_from_southwest_mini. ... Mount Garibaldi is a stratovolcano in the British Columbia part of the Cascade Range. ... Mount Baker (elevation 10,778 feet, 3,285 m) is a glaciated andesitic stratovolcano in the Cascades of Washington State in the United States about 30 miles (50km) due east of the city of Bellingham, Whatcom County. ... Glacier Peak is the most remote of the five active volcanoes in Washington. ... Mount Rainier is a stratovolcano located 54 miles (87 km) southeast of Seattle, Washington, in the United States. ... Mount St. ... Mt. ... Mount Hood is an active stratovolcano in northern Oregon, in the Pacific Northwest region of the United States. ... For other mountains named Mount Jefferson, see Mount Jefferson Mount Jefferson is a possibly extinct stratovolcano in the Cascade Range and is the second-highest mountain in Oregon. ... The Three Sisters are three volcanic peaks of the Cascade Range, located about 15 miles SW from the nearest town of Sisters, Oregon. ... Newberry Volcano 7,985 ft (2,434 m) high is large shield volcano located 40 miles (60 km) east of the Cascade Range and about 20 miles (30 km) southeast of Bend, Oregon. ... Mount Mazama is a destroyed stratovolcano in the Oregon part of the Cascade Range. ... Medicine Lake Volcano is a large shield volcano in the northeastern California about 50 kilometres (30 miles) northeast of Mount Shasta. ... Mount Shasta, a 14,162-foot (4,322 m) stratovolcano, is the second-highest peak in the Cascade Range and the second-highest peak in California outside of the Sierra Nevada [1]. The mountain stands 10,000 feet (3,000 m) above the surrounding area and has an estimated volume... Lassen Peak, in Shasta County, California USA, is the largest plug dome volcano in the world and is the southernmost volcano in the Cascade Range. ...