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Northern Patagonian Ice Field
The Northern Patagonian Ice Field, located in southern Chile, is the smaller of two remnant parts in which the Patagonian Ice Sheet in the Andes Mountains of southern South America can be divided. It is completely contained within the boundaries of Laguna San Rafael National Park. Description The Northern Patagonian Ice Field is a vestige of the Patagonian Ice Sheet, an extensive ice sheet that covered all of Chilean Patagonia and the westernmost parts of Argentine Patagonia during the Quaternary glaciations. Today, with its glaciers largely in retreat and only an area of , it is still the second largest continuous mass of ice outside of the polar regions. Its survival depends on its elevation (), favorable terrain and a cool, moist, oceanic climate. The ice field has 28 exit glaciers, the largest two — San Quintin and San Rafael — nearly reach sea level to the west at the Pacific Ocean. Smaller exit glaciers, like San Valentín and Nef, feed numerous rivers and gla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aysén Region
The Aysén del General Carlos Ibáñez del Campo Region ( es, Región de Aysén, , '), often shortened to Aysén Region or Aisén,Examples of name usage1, official regional government site refers to the region as "Región de Aysén"., Chile's official meteorological agency refers to the region as "Región de Aisén".3 Chilean government official website refers of Pilar Cuevas Mardones as intendant of "Región de Aysén" .4 Chile's Ministry of Public Works calls the region "Región de Aysén" in the title of their 2011 report on that region.5, Corporación Nacional Forestal, a government agency refers to the region as "Región de Aysén" in their homepage. Here is some evidence of the short name use in English:I '' The Guardian'' reports on the 2012 Aysén protest.II ''Santiago Times'', a local English language newspaper use "Aysén Region" in a note referring to the same protest.III''Santiago Times'' again. *Vscientific paper in ''Journal of Hospital Infection'' referring to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eric Shipton
Eric Earle Shipton, CBE (1 August 1907 – 28 March 1977), was an English Himalayan mountaineer. Early years Shipton was born in Ceylon (now Sri Lanka) in 1907 where his father, a tea planter, died before he was three years old. When he was eight, his mother brought him to London for his education. When he failed the entrance exam to Harrow School, his mother sent him to Pyt House School in Wiltshire. His first encounter with mountains was at 15 when he visited the Pyrenees with his family. The next summer he spent travelling in Norway with a school friend and within a year he had begun climbing seriously. Africa and the Himalaya In 1928 he went to Kenya as a coffee grower and first climbed Nelion, a peak of Mount Kenya, in 1929. It was also in Kenya's community of Europeans where he met his future climbing partners Bill Tilman and Percy Wyn-Harris. Together with Wyn-Harris, he climbed the twin peaks of Mount Kenya. With Frank Smythe, Shipton was amongst the first climbers t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Glaciers
A glacier ( ) or () is a persistent body of dense ice that is constantly moving under its own weight; it forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. Glaciers slowly deform and flow due to stresses induced by their weight, creating crevasses, seracs, and other distinguishing features. Because glacial mass is affected by long-term climate changes, e.g., precipitation, mean temperature, and cloud cover, glacial mass changes are considered among the most sensitive indicators of climate change. There are about 198,000 to 200,000 glaciers in the world. Glaciers by continent Africa Africa, specifically East Africa, has contained glacial regions, possibly as far back as the last glacier maximum 10 to 15 thousand years ago. Seasonal snow does exist on the highest peaks of East Africa as well as in the Drakensberg Range of South Africa, the Stormberg Mountains, and the Atlas Mountains in Morocco. Current ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Patagonian Ice Field
The Southern Patagonian Ice Field ( es, Hielo Continental or '), located at the Southern Patagonic Andes between Chile and Argentina, is the world's second largest contiguous extrapolar ice field. It is the bigger of two remnant parts of the Patagonian Ice Sheet, which covered all of southern Chile during the last glacial period, locally called the Llanquihue glaciation. Geography The Southern Patagonia Ice Field extends from parallels 48° 15′ S to 51° 30′ S for approximately , and has an approximate area of , of which 14,200 km2 belong to Chile and 2,600 km2 belong to Argentina. The ice mass feeds dozens of glaciers in the area, among which are the Upsala (765 km2), Viedma (978 km2) and Perito Moreno (258 km2) in the Los Glaciares National Park in Argentina, and the Pío XI Glacier or Bruggen Glacier (1,265 km2, the largest in area and longest in the southern hemisphere outside of Antarctica), O'Higgins (820 km2), G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tortel Fjord
Tortel Fjord ( es, Fiordo de Tortel) is an inlet of the Pacific Ocean in Chile's Aysén Region. The village of Caleta Tortel is located at the head of fjord In physical geography, a fjord or fiord () is a long, narrow inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Alaska, Antarctica, British Columbia, Chile, Denmark, Germany, Greenland, the Faroe Islands, Icel .... The fjord may lie in a zone of tectonic extension. The shores of the fiord are known to freeze in exceptionally cold winters. References Fjords of Chile Bodies of water of Aysén Region {{Aysén-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extensional Tectonics
Extensional tectonics is concerned with the structures formed by, and the tectonic processes associated with, the stretching of a planetary body's crust or lithosphere. Deformation styles The types of structure and the geometries formed depend on the amount of stretching involved. Stretching is generally measured using the parameter ''β'', known as the ''beta factor'', where : \beta = \frac \,, ''t''0 is the initial crustal thickness and ''t''1 is the final crustal thickness. It is also the equivalent of the strain parameter ''stretch''. Low beta factor In areas of relatively low crustal stretching, the dominant structures are high to moderate angle normal faults, with associated half grabens and tilted fault blocks. High beta factor In areas of high crustal stretching, individual extensional faults may become rotated to too low a dip to remain active and a new set of faults may be generated. Large displacements may juxtapose syntectonic sediments against metamorphic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cachet Fault
Cachet Fault is a dextral strike-slip fault in Aysén Region, Chile. The fault runs in north–south direction right to the east of the Northern Patagonian Ice Field. Various west-east glacial valleys have been displaced the movement of the fault. The existence of the fault and its movement has been linked to the Chile Triple Junction and the oblique subduction of Nazca Plate. The fault exhibits present-day seismicity. Together, Exploradores Fault Zone and Liquiñe-Ofqui Fault Zone and Cachet Fault makes up the boundaries of a crustal block Fault blocks are very large blocks of rock, sometimes hundreds of kilometres in extent, created by tectonic and localized stresses in Earth's crust. Large areas of bedrock are broken up into blocks by faults. Blocks are characterized by relat ... that has been uplifted hosting at present the Northern Patagonian Ice Field. References Geology of Aysén Region Seismic faults of Chile Strike-slip faults {{struct-geology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault Block
Fault blocks are very large blocks of rock, sometimes hundreds of kilometres in extent, created by tectonic and localized stresses in Earth's crust. Large areas of bedrock are broken up into blocks by faults. Blocks are characterized by relatively uniform lithology. The largest of these fault blocks are called crustal blocks. Large crustal blocks broken off from tectonic plates are called terranes. Those terranes which are the full thickness of the lithosphere are called microplates. Continent-sized blocks are called variously ''microcontinents, continental ribbons, H-blocks, extensional allochthons and outer highs.'' Because most stresses relate to the tectonic activity of moving plates, most motion between blocks is horizontal, that is parallel to the Earth's crust by strike-slip faults. However vertical movement of blocks produces much more dramatic results. Landforms (mountains, hills, ridges, lakes, valleys, etc.) are sometimes formed when the faults have a large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A '' fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monte San Valentín
Monte San Valentin, also known as Monte San Clemente, is the highest mountain in Chilean Patagonia and the highest mountain south of 37°S outside Antarctica. It stands at the north end of the North Patagonian Icefield. Monte San Valentin can be climbed from Lago Leones, to the south east, or from Laguna San Rafael, to the west. The ascent is long and is particularly subject to bad weather. The accident and fatality rate is high. There is some confusion about the elevation. It was originally estimated at 3,876m by Nordenskjold in 1921 but later thought to be 4,058m. The latter is the most commonly quoted elevation and is quoted here. A French group that climbed the San Valentin in 1993 included two surveyors, who calculated an elevation of 4,080±20 m by using a GPS. In 2001 a Chilean group measured 4,070±40 m, also using GPS. SRTM and ASTER GDEM data also support an elevation in excess of 4,000 metres. However, Chilean IGM mapping gives only 3,910 metres. ChIGM maps are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
