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Lake Nahuel-Huapi
Nahuel Huapi Lake ( es, Lago Nahuel Huapí) is a lake in the lake region of northern Patagonia between the provinces of Río Negro and Neuquén, in Argentina. The tourist center of Bariloche is on the southern shore of the lake. The June 2011 eruption of the Puyehue-Cordón Caulle volcanic complex, in neighboring Chile, caused parts of the lake's surface to be blanketed in volcanic ash. During the Last Glacial Maximum of the Llanquihue glaciation the lake basin was wholly occupied by a glacier. Etymology The name of the lake derives from the toponym of its major island in Mapudungun (Mapuche language): "Island of Puma", from ''nahuel'', 'puma', and ''huapí'', 'island'. There is, however, more to the word "Nahuel"—it can also signify 'a man who by sorcery has been transformed to a puma'. Geography Nahuel Huapi lake, located within the Nahuel Huapi National Park, has a surface of , rests above the sea level, and has a maximum measured depth (as of 2007) of . The lak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Lagos Department
Los Lagos is a department located in the south of Neuquén Province, Argentina. Geography The Department limits with Lácar Department at north, Rio Negro Province at the east and southeast, with Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ... at southwest and east. {{coord, 40, 45, 43, S, 71, 38, 35, W, source:kolossus-eswiki, display=title Departments of Neuquén Province ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Llanquihue Glaciation
The last glacial period and its associated glaciation is known in southern Chile as the Llanquihue glaciation ( es, Glaciación de Llanquihue). Its type area lies west of Llanquihue Lake where various drifts or end moraine systems belonging to the last glacial period have been identified. The glaciation is the last episode of existence of the Patagonian Ice Sheet. The preceding interglacial is known as the Valdivia interglacial after its type locality of Valdivia. General characteristics The characteristics of the glaciation differ according to latitude. In Central Chile, south of Atacama Desert, the extent of the Llanquihue glaciation was controlled by precipitation which increases to the south. Maximum glaciers advances were not synchronous across the whole latitudinal gradient as they were triggered by north and southward shifts in the moisture-bringing Westerlies and its storm tracks. Glaciers in Central Chile were particularly sensitive to shifts in the precipitation pat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gutiérrez Lake
Gutiérrez Lake ( es, Lago Gutiérrez) is a lake of the lake region of northern Patagonia in the province of Río Negro, in Argentina. It is of glacial origin, being a Moraine-dammed lake. The lake is connected to Nahuel Huapi Lake. It was named by explorer and naturalist Francisco P. Moreno as an homage to his academic mentor Juan María Gutiérrez. The lake harbors several species of trout including rainbow trout, brown trout and brook trout which attract anglers from the world over Despite being nowhere near any ocean and being at high altitude, the lake is also home to the kelp gull and the blue-eyed cormorant (''Phalacrocorax atriceps''), otherwise strictly marine birds The lake's clear waters are very susceptible to climate change and have an average surface temperature of 45 °F (7 °C). |
Moraine-dammed Lake
A moraine-dammed lake occurs when the terminal moraine has prevented some meltwater from leaving the valley. Its most common shape is that of a long ribbon (ribbon lake). Example of moraine dammed lakes include: *Argentina/Chile: General Carrera/Buenos Aires Lake *Chile: Calafquén Lake, Panguipulli Lake *Ireland: Lough Dan *Nepal: Tsho Rolpa *New Zealand: Lake Hāwea, Lake Ohau, Lake Pukaki, Lake Tekapo, Lake Wakatipu, and Lake Wanaka (i.e., almost all large lakes in the South Island) *Switzerland: Lake Zurich *United States: Donner Lake in California, Flathead Lake in Montana, Mille Lacs Lake in Minnesota, Wallowa Lake in Oregon *Wales: Llyn Peris and its twin Llyn Padarn. *Poland: Morskie Oko in Zakopane *Slovakia: Strbske pleso, Velke Hincovo pleso In the 19th century the Argentine explorer Francisco Perito Moreno suggested that many Patagonian lakes draining to the Pacific were in fact part of the Atlantic basin but had been moraine dammed during the quaternary glaciatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ... [...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 the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacial Valley
U-shaped valleys, also called trough valleys or glacial troughs, are formed by the process of glaciation. They are characteristic of mountain glaciation in particular. They have a characteristic U shape in cross-section, with steep, straight sides and a flat or rounded bottom (by contrast, valleys carved by rivers tend to be V-shaped in cross-section). Glaciated valleys are formed when a glacier travels across and down a slope, carving the valley by the action of scouring. When the ice recedes or thaws, the valley remains, often littered with small boulders that were transported within the ice, called glacial till or glacial erratic. Examples of U-shaped valleys are found in mountainous regions throughout the world including the Andes, Alps, Caucasus Mountains, Himalaya, Rocky Mountains, New Zealand and the Scandinavian Mountains. They are found also in other major European mountains including the Carpathian Mountains, the Pyrenees, the Rila and Pirin mountains in Bulgaria, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nahuel Huapi National Park
Nahuel Huapi National Park () is the oldest national park in Argentina, established in 1934. It surrounds Nahuel Huapi Lake in the foothills of the Patagonian Andes. The largest of the national parks in the region, it has an area of , or nearly 2 million acres. Its landscapes represent the north Patagonian Andean Zone consisting of three types, namely, the Altoandino (with perpetual snow above an altitude of ), the Andino-Patagónico (in the lower reaches of the hills) and the Patagonian steppe. It also represents small parts of the Valdivian Rainforest. The park and the reserve lie at an altitude of , and are designated under IUCN management categories II (National Park) and IV (Management Reserve). The park is completely protected while the reserve is partially protected. The national park is dominated by the high mountain chain of the Andes, many lakes, rapid rivers, waterfalls, snow-clad peaks, glaciers and extensive forests. It is bordered by Chile on its western side. Et ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
