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Western Cascades
The Western Cascades or Old Cascades are a sub-province of the Cascade Range in the U.S. state of Oregon, between the Willamette Valley and the High Cascades. The Western Cascades contain many extinct shield volcanoes, cinder cones and lava flows, and the region is highly eroded and heavily forested. Deposits of the same age as the Western Cascades are also found in southwest Washington state. Geology The region was volcanically active from approximately 35 to 17 million years ago. The province is characterized as an older, deeply eroded volcanic range lying west of the more recent High Cascades. The Western Cascades range in elevation from on the western margin to on the eastern margin. The Western Cascades began to form 40 million years ago with eruptions from a chain of volcanoes near the Eocene shoreline. Volcanic activity gradually shifted to the east in the Miocene and Pliocene. The Western Cascades are made up almost entirely of slightly deformed and partly al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breitenbush River
The Breitenbush River is a tributary of the North Santiam River in western Oregon in the United States. It drains a rugged, forested area of the Cascade Range east of Salem. It descends from several short forks in the Mount Jefferson Wilderness in the high Cascades of eastern Marion County. The South Fork Breitenbush River begins at creeks flowing from Bays Lake and Russell Lake within Jefferson Park at approximately elevation and flows west-northwest, joining with other forks. The North Fork Breitenbush River begins at Breitenbush Lake (mostly on the Warm Springs Reservation) and joins with another fork which passes by Pyramid Lake. It flows west-northwest and connects with a half dozen other forks and creeks then turns west-southwest abeam Bald Butte. Several more creeks and Mink Creek and Rapidam Creek join before another fork. The North and South forks flow west, joining east of the small community of Breitenbush. The combined stream flows generally west-southwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dacite
Dacite () is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz. Dacite is relatively common, occurring in many tectonic settings. It is associated with andesite and rhyolite as part of the subalkaline tholeiitic and calc-alkaline magma series. Etymology The word ''dacite'' comes from Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains (now modern Romania and Moldova) where the rock was first described. The term ''dacite'' was used for the first time in the scientific literature in the book ''Geologie Siebenbürgens'' (''The Geology of Transylvania'') by Austrian geologists Franz Ritter von Hauer and Guido Stache. Dacite was originally defined as a new rock type to separate calc-alkaline ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge University Press
Cambridge University Press was the university press of the University of Cambridge. Granted a letters patent by King Henry VIII in 1534, it was the oldest university press in the world. Cambridge University Press merged with Cambridge Assessment to form Cambridge University Press and Assessment under Queen Elizabeth II's approval in August 2021. With a global sales presence, publishing hubs, and offices in more than 40 countries, it published over 50,000 titles by authors from over 100 countries. Its publications include more than 420 academic journals, monographs, reference works, school and university textbooks, and English language teaching and learning publications. It also published Bibles, runs a bookshop in Cambridge, sells through Amazon, and has a conference venues business in Cambridge at the Pitt Building and the Sir Geoffrey Cass Sports and Social Centre. It also served as the King's Printer. Cambridge University Press, as part of the University of Cambridge, was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Ax Mountain
Battle Ax is a shield volcano in the West Cascade Range of Oregon. The shield is mostly made of andesite. The summit, which can be reached via the Battle Ax Mountain trail, marks the boundary between the Mount Hood National Forest and the Willamette National Forest as well as the boundary between the Opal Creek Wilderness and the Bull of the Woods Wilderness. Battle Ax was supposedly named after the variety of chewing tobacco used by a local logger. See also * List of volcanoes in the United States * Cascade Volcanoes References External links * Shield volcanoes of the United States Subduction volcanoes Cascade Volcanoes Volcanoes of Oregon Mountains of Oregon Landforms of Marion County, Oregon Mountains of Marion County, Oregon Pleistocene shield volcanoes {{MarionCountyOR-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armet Creek
The armet is a type of combat helmet which was developed in the 15th century. It was extensively used in Italy, France, England, the Low Countries and Spain. It was distinguished by being the first helmet of its era to completely enclose the head while being compact and light enough to move with the wearer. Its use was essentially restricted to the fully armoured man-at-arms. Appearance and origins As the armet was fully enclosing, and narrowed to follow the contours of the neck and throat, it had to have a mechanical means of opening and closing to enable it to be worn. The typical armet consisted of four pieces: the skull, the two large hinged cheek-pieces which locked at the front over the chin, and a visor which had a double pivot, one either side of the skull. The cheek-pieces opened laterally by means of horizontal hinges; when closed they overlapped at the chin, fastening by a spring-pin which engaged in a corresponding hole, or by a swivel-hook and pierced staple. A rein ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geographic Coordinates
A geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude. It is the simplest, oldest, and most widely used type of the various spatial reference systems that are in use, and forms the basis for most others. Although latitude and longitude form a coordinate tuple like a cartesian coordinate system, the geographic coordinate system is not cartesian because the measurements are angles and are not on a planar surface. A full GCS specification, such as those listed in the EPSG and ISO 19111 standards, also includes a choice of geodetic datum (including an Earth ellipsoid), as different datums will yield different latitude and longitude values for the same location. History The invention of a geographic coordinate system is generally credited to Eratosthenes of Cyrene, who composed his now-lost ''Geography'' at the Library of Alexandria in the 3rd century ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rana Cascadae
Rana may refer to: Astronomy * Rana (crater), a crater on Mars * Delta Eridani or Rana, a star Films * Rana (2012 film), an Indian Kannada-language action drama * Rana, a 1998 Telugu-language action film directed by A. Kodandarami Reddy * Rana (cancelled film), an unfinished Indian film by K. S. Ravikumar People and characters * Rana (clan), a clan of Gurjars in Punjab & Kashmir * Rana (name), a given name and surname (including a list of people and characters with the name) * Rana dynasty, a ruling dynasty in Nepal (1846–1951) Places *Rana, Burkina Faso, a town in Boulkiemdé Province *Raná (Chrudim District), a municipality and village in Pardubice Region, Czech Republic *Raná (Louny District), a municipality and village in Ústí nad Labem Region, Czech Republic *Rana Municipality, a municipality in Nordland County, Norway *Råna, a mountain in Møre og Romsdal County, Norway * Rana Colony, a town in Punjab Province, Pakistan *Ra'na, a former village in Palestine *Rana ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plethodon Vandykei
Van Dyke's salamander (''Plethodon vandykei'') is a small woodland salamander in the family Plethodontidae, the lungless salamanders. These animals breathe through their skin and are largely terrestrial. Compared to other salamanders in ''Plethodon'' it is relatively stocky with long legs. Usually associated with streams, seepages, and rock outcrops, it is endemic to Washington where it is found in a limited number of small, isolated populations. Taxonomy Van Dyke's salamander was first described by John Van Denburgh in 1906 from a specimen found in Mount Rainier National Park. The species was named in honor of its collector, Edwin Cooper Van Dyke. The Coeur d'Alene salamander (''Plethodon idahoensis'') and the Larch Mountain salamander (''Plethodon larselli'') are its two closest relatives in the region. At one time, all three were thought to be members of the same species until genetic studies concluded that they were distinct species.Olson (2014)Frost (2016) Description Va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicamptodon Copei
Cope's giant salamander (''Dicamptodon copei'') is a species of salamander in the family Dicamptodontidae, the Pacific giant salamanders.Behler, J. L. and F. W. King. (1979) ''National Audubon Society Field Guide to Reptiles and Amphibians'', Knopf, It is native to Washington and Oregon in the Pacific Northwest region of the United States. Description This species can attain lengths up to 19.5 centimeters. It exhibits neoteny rarely undergoing metamorphosis to the adult form, and resembles the larvae of similar salamander species. It usually becomes sexually, but not physically, mature. It is gold and brown in color. The costal grooves are inconspicuous. It has a rounded snout and the laterally compressed, fin-like tail of a typical larva. It retains its gills.Hallock, L. A. and McAllister, K. R. 2009Cope's Giant Salamander. Washington Herp Atlas. Behavior Little is known about the species' habitat requirements, but it has been found in mountain pools and streams. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbia River Gorge
The Columbia River Gorge is a canyon of the Columbia River in the Pacific Northwest of the United States. Up to deep, the canyon stretches for over as the river winds westward through the Cascade Range, forming the boundary between the state of Washington to the north and Oregon to the south. Extending roughly from the confluence of the Columbia with the Deschutes River (and the towns of Roosevelt, Washington, and Arlington, Oregon) in the east down to the eastern reaches of the Portland metropolitan area, the water gap furnishes the only navigable route through the Cascades and the only water connection between the Columbia Plateau and the Pacific Ocean. It is thus that the routes of Interstate 84, U.S. Route 30, Washington State Route 14, and railroad tracks on both sides run through the gorge. A popular recreational destination, the gorge holds federally protected status as the Columbia River Gorge National Scenic Area and is managed by the Columbia River Gorge Commis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
