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Mount Scott (Klamath County, Oregon)
Mount Scott is a small stratovolcano and a so-called '' parasitic cone'' on the southeast flank of Crater Lake in southern Oregon. It is approximately 420,000 years old. Its summit is the highest point within Crater Lake National Park, and the tenth highest peak in the Oregon Cascades. A small fire lookout tower stands on the summit, at the end of a trail that zigzags approximately 1,500 feet (460 m) up the mountain. The mountain is named for Oregon pioneer Levi Scott, founder of Scottsburg, Oregon. Geology Mount Scott first erupted about 420,000 years ago and is one of the oldest volcanoes in the Mount Mazama complex. It erupted mainly andesitic lavas before becoming extinct in the late Pleistocene. Since it was relatively far away from the main flanks of Mount Mazama, it survived the mountain's massive explosion that occurred around 5700 BC. At tall, Mount Scott is the highest point in Crater Lake National Park. Most of the lower slopes are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Mountain Peaks Of Oregon
This article comprises three sortable tables of Summit, major mountain peaksThis article defines a significant summit as a summit with at least of topographic prominence, and a major summit as a summit with at least of topographic prominence. All summits in this article have at least 500 meters of topographic prominence. An Ultra-prominent peak, ultra-prominent summit is a summit with at least of topographic prominence. of the United States, U.S. Oregon, State of Oregon. The summit of a mountain or hill may be measured in three principal ways: #The Elevation, topographic elevation of a summit measures the height of the summit above a Geoid, geodetic sea level.All elevations in this article include an elevation adjustment from the National Geodetic Vertical Datum of 1929 (NGVD 29) to the North American Vertical Datum of 1988 (NAVD 88). For further information, please see this United States National Geodetic Survey]noteIf the elevation or prominence of a summit is cal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scottsburg, Oregon
Scottsburg is an unincorporated community in Douglas County, Oregon, United States. It is along the Umpqua River and Oregon Route 38, and is about from the Pacific Ocean. It was once a growing town but after the Great Flood of 1862 the town declined. Scottsburg was named for pioneer Levi Scott. The city is located at what was the headwaters of navigation on the Umpqua River, some from the ocean. For a short time in the 1850s and 1860s, it was a seaport servicing the interior of Southern Oregon. Scottsburg was a transfer point for a [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravel
Gravel () is a loose aggregation of rock fragments. Gravel occurs naturally on Earth as a result of sedimentation, sedimentary and erosion, erosive geological processes; it is also produced in large quantities commercially as crushed stone. Gravel is classified by grain size, particle size range and includes size classes from granule (geology), granule- to boulder-sized fragments. In the grain size, Udden-Wentworth scale gravel is categorized into granular gravel () and pebble gravel (). ISO 14688 grades gravels as fine, medium, and coarse, with ranges for fine and for coarse. One cubic metre of gravel typically weighs about , or one cubic yard weighs about . Gravel is an important commercial product, with a number of applications. Almost half of all gravel production is used as construction aggregate, aggregate for concrete. Much of the rest is used for road construction, either in the road base or as the road surface (with or without bitumen, asphalt or other binders.) Natu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pumice
Pumice (), called pumicite in its powdered or dust form, is a volcanic rock that consists of extremely vesicular rough-textured volcanic glass, which may or may not contain crystals. It is typically light-colored. Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls, and being dark colored and denser.Jackson, J.A., J. Mehl, and K. Neuendorf (2005) ''Glossary of Geology'' American Geological Institute, Alexandria, Virginia. 800 pp. McPhie, J., M. Doyle, and R. Allen (1993) ''Volcanic Textures A guide to the interpretation of textures in volcanic rocks'' Centre for Ore Deposit and Exploration Studies, University of Tasmania, Hobart, Tasmania..198 pp. Pumice is created when super-heated, highly pressurized rock is rapidly ejected from a volcano. The unusual foamy configuration of pumice happens because of simultaneous rapid cooling and rapid depressurization. The depressurization creates bubbles by lowering the sol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Ash
Volcanic ash consists of fragments of rock, mineral crystals, and volcanic glass, produced during volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter. The term volcanic ash is also often loosely used to refer to all explosive eruption products (correctly referred to as '' tephra''), including particles larger than 2 mm. Volcanic ash is formed during explosive volcanic eruptions when dissolved gases in magma expand and escape violently into the atmosphere. The force of the gases shatters the magma and propels it into the atmosphere where it solidifies into fragments of volcanic rock and glass. Ash is also produced when magma comes into contact with water during phreatomagmatic eruptions, causing the water to explosively flash to steam leading to shattering of magma. Once in the air, ash is transported by wind up to thousands of kilometres away. Due to its wide dispersal, ash can have a number of impacts on society, including animal a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilderness Press
Wilderness Press is a publisher of outdoor guidebooks and maps that was founded in Berkeley, California in 1967. Its first publication was ''Sierra North'' (1967/2005). Reissued in 2005, this is considered the authoritative guidebook for hikers and backpackers in the Northern Sierra Nevada. Since the debut of ''Sierra North'' in 1967, Wilderness Press has become well known for its outdoor titles, guidebooks, and maps. It has been owned by Keen Communications since 2008, and headquarters have moved to Birmingham, Alabama Birmingham ( ) is a city in the north central region of Alabama, United States. It is the county seat of Jefferson County, Alabama, Jefferson County. The population was 200,733 at the 2020 United States census, 2020 census, making it the List .... Select bibliography *'' Walking Brooklyn'' References External links * Book publishing companies based in Berkeley, California Map publishing companies Publishing companies established in 1967 Mass media ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Mountaineers (club)
The Mountaineers is an alpine club in the US state of Washington (state), Washington. Founded in 1906, it is organized as an outdoor recreation, education, and conservation 501(c)(3) nonprofit organization, and is based in Seattle, Washington. The club hosts a wide range of outdoor activities, primarily mountaineering, alpine mountain climbing and hikes. The club also hosts classes, training courses, and social events. The club runs a publishing business, Mountaineers Books, which has several imprints. Publications include ''Mountaineering: The Freedom of the Hills''. Organization and activities The Mountaineers has 7 branches in Western Washington, 3 mountain lodges, and 2 program centers: one in Magnuson Park in Seattle, and one in Tacoma. All classes and trips are organized. History Originally a Seattle-based part of the Mazamas, a Portland, Oregon, Portland based group founded in 1894, The Mountaineers formed their own branch shortly after the 1906 Mazamas Mount Baker ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Mazama
Mount Mazama ( Klamath: ''Tum-sum-ne'') is a complex volcano in the western U.S. state of Oregon, in a segment of the Cascade Volcanic Arc and Cascade Range. The volcano is in Klamath County, in the southern Cascades, north of the Oregon–California border. Its collapse, due to the eruption of magma emptying the underlying magma chamber, formed a caldera that holds Crater Lake (''Giiwas'' in the Native American language Klamath). Mount Mazama originally had an elevation of approximately , but following its climactic eruption this was reduced to . Crater Lake is deep, the deepest freshwater body in the U.S. and the second deepest in North America after Great Slave Lake in Canada. Mount Mazama formed as a group of overlapping volcanic edifices such as shield volcanoes and small composite cones, becoming active intermittently until its climactic eruption 7,700 years ago. This eruption, the largest known within the Cascade Volcanic Arc in a million years, destroyed Mazama's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek () 'most' and (; Latinized as ) 'new'. The aridification and cooling trends of the preceding Neogene were continued in the Pleistocene. The climate was strongly variable depending on the glacial cycle, oscillating between cold Glacial period, glacial periods and warmer Interglacial, int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andesite
Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, andesites are a component of the Geology of Mars, Martian crust. The name ''andesite'' is derived from the Andes mountain range, where this rock type is found in abundance. It was first applied by Christian Leopold von Buch in 1826. Description Andesite is an aphanitic (fine-grained) to porphyritic (coarse-grained) igneous rock that is intermediate in its content of silica and low in alkali metals. It has less than 20% quartz and 10% feldspa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Workman Publishing Company
Workman Publishing Company, Inc., is an American publisher of trade books founded by Peter Workman. The company consists of imprints Workman, Workman Children's, Workman Calendars, Artisan, Algonquin Books of Chapel Hill and Algonquin Young Readers, Storey Publishing, and Timber Press. From the beginning Workman focused on publishing adult and children's non-fiction, and its titles and brands rank among the best-known in their fields, including: the What to Expect pregnancy and childcare guide; the educational series, '' Brain Quest'' and ''The Big Fat Notebooks;'' travel books like ''1,000 Places to See Before You Die'' and ''Atlas Obscura''; humor including ''The Complete Preppy Handbook'' and ''Bad Cat;'' award-winning cookbooks: ''The Noma Guide to Fermentation, The French Laundry Cookbook, Sheet Pan Suppers,'' ''The Silver Palate Cookbook, The Barbecue Bible;'' and novels including ''How the Garcia Girls Lost Their Accents'''', Water for Elephants'' and the Young Adul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Mazama Complex
Mount Mazama ( Klamath: ''Tum-sum-ne'') is a complex volcano in the western U.S. state of Oregon, in a segment of the Cascade Volcanic Arc and Cascade Range. The volcano is in Klamath County, in the southern Cascades, north of the Oregon–California border. Its collapse, due to the eruption of magma emptying the underlying magma chamber, formed a caldera that holds Crater Lake (''Giiwas'' in the Native American language Klamath). Mount Mazama originally had an elevation of approximately , but following its climactic eruption this was reduced to . Crater Lake is deep, the deepest freshwater body in the U.S. and the second deepest in North America after Great Slave Lake in Canada. Mount Mazama formed as a group of overlapping volcanic edifices such as shield volcanoes and small composite cones, becoming active intermittently until its climactic eruption 7,700 years ago. This eruption, the largest known within the Cascade Volcanic Arc in a million years, destroyed Mazama's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
