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Sundial (Olympic Mountains)
Sundial is a mountain summit located within Olympic National Park, in Jefferson County of Washington state. Sundial is part of The Needles range, which is a subrange of the Olympic Mountains. Its nearest higher neighbor is Mount Clark, to the northwest, and Mount Johnson is set to the west. The climbing routes on Sundial start at class 3 scrambling via the East Face, and range up to class 5 via the South Side Face. The first ascent of the mountain was made in 1944 by Adel and William Degenhardt. The mountain is so named because the time of day can be approximated as an observer in Royal Basin watches the sun's rays make their way down the east face of this mountain in the morning. Precipitation runoff from the mountain drains into Royal Creek which is a tributary of the Dungeness River. Climate Based on the Köppen climate classification, Sundial is located in the marine west coast climate zone of western North America. Most weather fronts originate in the Pac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Clark (Washington)
Mount Clark is a mountain summit located within Olympic National Park in Jefferson County of Washington state. Its nearest higher peak is Sweat Spire (7,580 ft) on Mount Johnson, to the southwest, and Mount Walkinshaw is set to the north. It is the second highest peak in The Needles range, which is a subrange of the Olympic Mountains, and seventh highest in the Olympic Mountains. The climbing routes on Mt. Clark start at Class 3 scrambling and range up to Class 5.5 via the central South Face. Precipitation runoff from the mountain drains into tributaries of the Dungeness River. History The first ascent of the mountain was made on August 21, 1940, by George R. Martin and Elvin Johnson who dubbed the peak ''Mt. Belvedere''. The mountain was officially named in 1965 to honor Irving M. Clark (1882-1960), a Seattle conservationist and leader in the establishment of Olympic National Park. Climate Based on the Köppen climate classification, Mount Clark is locat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köppen Climate Classification
The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notably in 1918 and 1936. Later, the climatologist Rudolf Geiger (1894–1981) introduced some changes to the classification system, which is thus sometimes called the Köppen–Geiger climate classification system. The Köppen climate classification divides climates into five main climate groups, with each group being divided based on seasonal precipitation and temperature patterns. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' indi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Walkinshaw
Mount Walkinshaw is a 7,378-foot (2,249 m) mountain summit located in the Olympic Mountains, in Jefferson County, Washington, Jefferson County of Washington (U.S. state), Washington state. It is situated within Olympic National Park, and is the northernmost peak in The Needles (Olympic Mountains), The Needles range, which is a subset of the Olympic range. Its nearest higher peak is Mount Clark (Washington), Mount Clark, to the south, and Gray Wolf Ridge arcs to the northeast. Mount Walkinshaw is set in the eastern portion of the Olympic Mountains within the drainage basin of the Dungeness River. This position puts it in the rain shadow of the Olympic Range, resulting in less precipitation than Mount Olympus and the western Olympics receive. History Originally known as ''The Citadel'', the Mount Walkinshaw toponym was officially adopted in 1965 to commemorate Robert B. Walkinshaw (1884-1963), author and lawyer whose conservation efforts contributed to the establishment of Olymp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Peak (Olympic Mountains)
Martin Peak is a mountain summit in the Olympic Mountains and is located in Jefferson County of Washington state. It is located within Olympic National Park. At high, Martin Peak is the seventh-highest peak of the Olympic Mountains, and the second-highest peak in The Needles range, which is a subset of the Olympic range. Its nearest higher neighbor is Mount Johnson, to the north-northwest. Precipitation runoff from this peak drains west into headwaters of Gray Wolf River, or east into Royal Creek, both of which are part of the Dungeness River drainage basin. Martin Peak was given its name based on the first ascent in 1940 by George W. Martin (1901–1970), and Elvin Johnson. Climate Martin Peak is located in the marine west coast climate zone of western North America. Weather fronts originating in the Pacific Ocean travel northeast toward the Olympic Mountains. As fronts approach, they are forced upward by the peaks ( orographic lift), causing them to drop their moist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweat Spire
Sweat Spire is a 7,580-foot-elevation (2,310 meter) summit located in the Olympic Mountains, in Jefferson County of Washington state. It is situated within Olympic National Park, and is set within the Daniel J. Evans Wilderness. It is part of The Needles range, which is a subset of the Olympic range. The nearest higher peak is Mount Johnson, to the southwest, and Gasp Pinnacle (7,520 ft) is to the immediate north. The spire is in the rain shadow of the Olympic Range, resulting in less precipitation than Mount Olympus and the western Olympics receive. Precipitation runoff from the mountain drains east into Royal Creek, and west into Gray Wolf River, which are both within the drainage basin of the Dungeness River. Topographic relief is significant as the east aspect rises over 2,400 feet (730 m) above Royal Basin in approximately one mile. The first ascent of the 200-foot-tall spire was made in 1962 by Hilton Keith, Joel Merkel, Joe Munson, and Jim Pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 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 grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing Great American Interchang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbidite
A turbidite is the geologic deposit of a turbidity current, which is a type of amalgamation of fluidal and sediment gravity flow responsible for distributing vast amounts of clastic sediment into the deep ocean. Sequencing Turbidites were first properly described by Arnold H. Bouma (1962), who studied deepwater sediments and recognized particular "fining-up intervals" within deep water, fine-grained shales, which were anomalous because they started at pebble conglomerates and terminated in shales. This was anomalous because within the deep ocean it had historically been assumed that there was no mechanism by which tractional flow could carry and deposit coarse-grained sediments into the abyssal depths. Bouma cycles begin with an erosional contact of a coarse lower bed of pebble to granule conglomerate in a sandy matrix, and grade up through coarse then medium plane parallel sandstone; through cross-bedded sandstone; rippled cross-bedded sand/silty sand, and finally lami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clastic Rock
Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus,Essentials of Geology, 3rd Ed, Stephen Marshak, p. G-3 chunks, and smaller grains of rock broken off other rocks by physical weathering.Essentials of Geology, 3rd Ed, Stephen Marshak, p. G-5 Geologists use the term clastic to refer to sedimentary rocks and particles in sediment transport, whether in suspension or as bed load, and in sediment deposits. Sedimentary clastic rocks Clastic sedimentary rocks are rocks composed predominantly of broken pieces or ''clasts'' of older weathered and eroded rocks. Clastic sediments or sedimentary rocks are classified based on grain size, clast and cementing material (matrix) composition, and texture. The classification factors are often useful in determining a sample's environment of deposition. An example of clastic environment would be a river system in which the full range of grains being transported by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obduction
Obduction is a geological process whereby denser oceanic crust (and even upper mantle) is scraped off a descending ocean plate at a convergent plate boundary and thrust on top of an adjacent plate. When oceanic and continental plates converge, normally the denser oceanic crust sinks under the continental crust in the process of subduction. Obduction, which is less common, normally occurs in plate collisions at orogenic belts (where an oceanic plate that is subducting scrapes some of its material onto the continental plate) or back-arc basins (places where the edge of a continent is pulled away from the rest of the continent due to the stress of plate collision). Obduction of oceanic lithosphere produces a characteristic set of rock types called an ophiolite. This assemblage consists of deep-marine sedimentary rock (chert, limestone, clastic sediments), volcanic rocks (pillow lavas, volcanic glass, volcanic ash, sheeted dykes and gabbros) and peridotite (mantle rock). John Mc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orographic Lift
Orographic lift occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. As the air mass gains altitude it quickly cools down adiabatically, which can raise the relative humidity to 100% and create clouds and, under the right conditions, precipitation. Orographic lifting can have a number of effects, including precipitation, rain shadowing, leeward winds, and associated clouds. Precipitation Precipitation induced by orographic lift occurs in many places throughout the world. Examples include: * The Mogollon Rim in central Arizona * The western slope of the Sierra Nevada range in California * The mountains near Baja California North – specifically La Bocana to Laguna Hanson. * The windward slopes of Khasi and Jayantia Hills (see Mawsynram) in the state of Meghalaya in India. * The Western Highlands of Yemen, which receive by far the most rain in Arabia. * The Western Ghats that run along India's western coast. * The Grea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continents of Asia and Oceania in the west and the Americas in the east. At in area (as defined with a southern Antarctic border), this largest division of the World Ocean—and, in turn, the hydrosphere—covers about 46% of Earth's water surface and about 32% of its total surface area, larger than Earth's entire land area combined .Pacific Ocean . '' Britannica Concise.'' 2008: Encyclopædia Britannica, Inc. The centers of both the |
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