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South Sister Bulge
--> , topo = USGS South Sister and North Sister , type = Two stratovolcanoes (South, Middle) and one shield volcano (North) , age = Quaternary , volcanic_arc = Cascade Volcanic Arc , last_eruption = 440 CE , first_ascent = , easiest_route = Hiking or scrambling, plus glacier travel on some routes The Three Sisters are closely spaced volcanic peaks in the U.S. state of Oregon. They are part of the Cascade Volcanic Arc, a segment of the Cascade Range in western North America extending from southern British Columbia through Washington and Oregon to Northern California. Each more than in elevation, they are the third-, fourth- and fifth-highest peaks in Oregon. Located in the Three Sisters Wilderness at the boundary of Lane and Deschutes counties and the Willamette and Deschutes national forests, they are about south of the nearest town, Sisters. Diverse species of flora and fauna inhabit the area, which is subject to frequent snowfall, occasional rain, and extreme tem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of The Most Prominent Summits Of The United States
The following sortable table comprises the 200 most topographically prominent mountain peaks of the United States of America. The summit of a mountain or hill may be measured in three principal ways: #The topographic elevation of a summit measures the height of the summit above a geodetic sea level.All elevations in the 48 states of the contiguous United States 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 Surveybr>noteIf the elevation or prominence of a summit is calculated as a range of values, the arithmetic mean is shown. #The topographic prominence of a summit is a measure of how high the summit rises above its surroundings.The topographic prominence of a summit is the topographic elevation difference between the summit and its highest or key col to a higher summit. The summit may be near its ke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three Sisters Wilderness
The Three Sisters Wilderness is a wilderness area in the Cascade Range, within the Willamette and Deschutes National Forests in Oregon, United States. It comprises , making it the second largest wilderness area in Oregon, after the Eagle Cap Wilderness. It was established by the United States Congress in 1964 and is named for the Three Sisters volcanoes. The wilderness boundary encloses the Three Sisters as well as Broken Top, which is southeast of South Sister.Three Sisters Wilderness - Wilderness.net Three Sisters was designated as a Biosphere Reserve under the |
Middle And South Sister, Looking North
Middle or The Middle may refer to: * Centre (geometry), the point equally distant from the outer limits. Places * Middle (sheading), a subdivision of the Isle of Man * Middle Bay (other) * Middle Brook (other) * Middle Creek (other) * Middle Island (other) * Middle Lake (other) * Middle Mountain, California * Middle Peninsula, Chesapeake Bay, Virginia * Middle Range, a former name of the Xueshan Range on Taiwan Island * Middle River (other) * Middle Rocks, two rocks at the eastern opening of the Straits of Singapore * Middle Sound, a bay in North Carolina * Middle Township (other) * Middle East Music * "Middle" (song), 2015 * "The Middle" (Jimmy Eat World song), 2001 * "The Middle" (Zedd, Maren Morris and Grey song), 2018 *"Middle", a song by Rocket from the Crypt from their 1995 album ''Scream, Dracula, Scream!'' *"The Middle", a song by Demi Lovato from their debut album ''Don't Forget'' *"The Middle", a song by T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broken Top
Broken Top is a glacially eroded complex volcano, complex stratovolcano. It lies in the Cascade Volcanic Arc, part of the extensive Cascade Range in the U.S. state of Oregon. Located southeast of the Three Sisters (Oregon), Three Sisters peaks, the volcano, residing within the Three Sisters Wilderness, is west of Bend, Oregon in Deschutes County, Oregon, Deschutes County. Eruptive activity stopped roughly 100,000 years ago, and currently, Erosion#Glaciers, erosion by glaciers has reduced the volcano's cone to where its contents are exposed. There are two named glaciers on the peak, Bend Glacier, Bend and Crook Glacier. Diverse species of flora and fauna inhabit the area, which is subject to frequent snowfall, occasional rain, and extreme temperature variation between seasons. Broken Top and its surrounding area constitute popular destinations for hiking, climbing, and scrambling. Geography Broken Top lies in the Cascade Volcanic Arc, roughly located at . It is part of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whychus Creek
Whychus Creek is a tributary of the Deschutes River in Deschutes and Jefferson counties in the U.S. state of Oregon. Formerly named ''Squaw Creek'', considered derogatory in the 21st century, it was renamed in 2006. Explorer John C. Frémont camped along the stream in 1843 but did not identify it by name. Robert S. Williamson, a surveyor who camped there in 1855, said its Indian (Native American) name was ''Why-chus''. Course Whychus Creek begins about above sea level at the base of Bend Glacier on Broken Top in the Cascade Range. Flowing generally north through the Three Sisters Wilderness, the stream plunges over Upper Chush Falls before receiving Park Creek from the left and plunging over Chush Falls. Downstream of the waterfalls, the creek receives South Fork and North Fork from the left and Snow Creek from the right. Turning northeast, the creek intersects Whychus Creek Canal, which diverts water to McKenzie Canyon Reservoir and other parts of the Three Sist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Source
The headwaters of a river or stream is the farthest place in that river or stream from its estuary or downstream confluence with another river, as measured along the course of the river. It is also known as a river's source. Definition The United States Geological Survey (USGS) states that a river's "length may be considered to be the distance from the mouth to the most distant headwater source (irrespective of stream name), or from the mouth to the headwaters of the stream commonly known as the source stream". As an example of the second definition above, the USGS at times considers the Missouri River as a tributary of the Mississippi River. But it also follows the first definition above (along with virtually all other geographic authorities and publications) in using the combined Missouri—lower Mississippi length figure in lists of lengths of rivers around the world. Most rivers have numerous tributaries and change names often; it is customary to regard the longest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waldo Lake Wilderness
Waldo Lake Wilderness is a wilderness area surrounding Waldo Lake in the central Oregon Cascades. It is located within the Willamette National Forest. It was established in 1984 and consists of . Geography Ninety-eight percent of the Waldo Lake Wilderness is covered by forest on moderate to steep terrain, which ranges in elevation from . Waldo Lake itself is outside the wilderness boundary, but it is considered one of the purest lakes in the world: vertical visibility can exceed . It was scooped out by ancient glaciers, and is Oregon's second largest lake at with a maximum depth of . Within the wilderness are the Six Lakes Basin, Eddeeleo Lakes, Wahanna Lakes, and Quinn Lakes. There are approximately of trails which lead to many of these lakes. Waldo Lake Trail, much of which is not in the wilderness boundary, provides a loop around Waldo Lake. Vegetation in the Waldo Lake Wilderness consists mostly of Douglas-fir, mountain hemlock, and Pacific silver fir. Recreatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Washington Wilderness
The Mount Washington Wilderness is a wilderness area located on and around Mount Washington in the central Cascade Range of Oregon in the United States. The wilderness was established in 1964 and comprises of the Willamette National Forest and Deschutes National Forest. It is administered by the U.S. Forest Service. Geography Mount Washington is a shield volcano rising above of lava-strewn plains. The wilderness includes Belknap Crater, a cinder and ash volcanic cone. Vegetation consists primarily of lodgepole pine, other species of pine, and mountain hemlock. There are 28 lakes in the wilderness. The Pacific Crest National Scenic Trail extends for through the Mount Washington Wilderness. It is the primary trail and extends from the north boundary near Big Lake to where it leaves the wilderness at its southern boundary near the Dee Wright Observatory. Ecology Described by Wuerthner (2003) as a "rocks and ice wilderness," much of the Mount Washington Wilderness cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Congress
The United States Congress is the legislature of the federal government of the United States. It is bicameral, composed of a lower body, the House of Representatives, and an upper body, the Senate. It meets in the U.S. Capitol in Washington, D.C. Senators and representatives are chosen through direct election, though vacancies in the Senate may be filled by a governor's appointment. Congress has 535 voting members: 100 senators and 435 representatives. The U.S. vice president has a vote in the Senate only when senators are evenly divided. The House of Representatives has six non-voting members. The sitting of a Congress is for a two-year term, at present, beginning every other January. Elections are held every even-numbered year on Election Day. The members of the House of Representatives are elected for the two-year term of a Congress. The Reapportionment Act of 1929 establishes that there be 435 representatives and the Uniform Congressional Redistricting Act requires ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilderness Area
Wilderness or wildlands (usually in the plural), are natural environments on Earth that have not been significantly modified by human activity or any nonurbanized land not under extensive agricultural cultivation. The term has traditionally referred to terrestrial environments, though growing attention is being placed on marine wilderness. Recent maps of wilderness suggest it covers roughly one quarter of Earth's terrestrial surface, but is being rapidly degraded by human activity. Even less wilderness remains in the ocean, with only 13.2% free from intense human activity. Some governments establish protection for wilderness areas by law to not only preserve what already exists, but also to promote and advance a natural expression and development. These can be set up in preserves, conservation preserves, national forests, national parks and even in urban areas along rivers, gulches or otherwise undeveloped areas. Often these areas are considered important for the survival of c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tectonic Uplift
Tectonic uplift is the geologic uplift of Earth's surface that is attributed to plate tectonics. While isostatic response is important, an increase in the mean elevation of a region can only occur in response to tectonic processes of crustal thickening (such as mountain building events), changes in the density distribution of the crust and underlying mantle, and flexural support due to the bending of rigid lithosphere. Tectonic uplift results in denudation (processes that wear away the earth's surface) by raising buried rocks closer to the surface. This process can redistribute large loads from an elevated region to a topographically lower area as well – thus promoting an isostatic response in the region of denudation (which can cause local bedrock uplift). The timing, magnitude, and rate of denudation can be estimated by geologists using pressure-temperature studies. Crustal thickening Crustal thickening has an upward component of motion and often occurs when continental crus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
