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Lake Poco Sol
Lake Poco Sol (from Spanish, "Little Sunshine"), or , is a volcanic lake in Costa Rica, in the Cordillera de Tilarán. The lake lies at an altitude of in a wide depression. The depth of the lake is about . Other volcanic features in the area include breccia, lahar deposits, lava flows and tuffs. The lake may be a landslide scar, or a crater left by a phreatic explosion. It is of probable Pleistocene age. It is constructed within the andesitic Monteverde Formation, which was erupted between 2.1 and 1 million years ago. Hot springs, mud pots and deposits of sulfur are found both at the lake and near the Río Penas Blancas. The area has been investigated for harnessing geothermal energy. The geothermal activity may be the source of the name ''Pocosol''. The active volcano Arenal lies north-northwest of Laguna Poco Sol. Arenal along with Cerro Chato between Arenal and Laguna Poco Sol and Cerro Pocosol south of Laguna Poco Sol may be located along a zone of tectonic weakne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Crater Lake
A volcanic crater lake is a lake in a crater that was formed by explosive activity or a collapse during a volcanic eruption. Formation Lakes in calderas fill large craters formed by the collapse of a volcano during an eruption. Lakes in maars fill medium-sized craters where an eruption deposited debris around a vent. Crater lakes form as the created depression, within the crater rim, is filled by water. The water may come from precipitation, groundwater circulation (often hydrothermal fluids in the case of volcanic craters) or melted ice. Its level rises until an equilibrium is reached between the rates of incoming and outgoing water. Sources of water loss singly or together may include evaporation, subsurface seepage, and, in places, surface leakage or overflow when the lake level reaches the lowest point on its rim. At such a saddle location, the upper portion of the lake is contained only by its adjacent natural volcanic dam; continued leakage through or surface outflow ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
