General Knowledge About World Geography in Urdu- Volcanoes
Volcanoe is a vent or fissure in the Earth’s crust through which hot molten lava, ash and gases reach the surface from the interior. It also refers to the mountain or hill formed by the ejected rock.
Type of Volcanoes:
Volcanoes can be on the land surface or in the oceans. These are of three types.
About 535 in the world, they are said to be active when eruptions occur frequently.
When no eruption has occurred over a long period of years.
When no eruptions have occurred during historic time, e.g. Aconcagua, the highest peak in the Andes, South America.
Volcanic Areas: Most of the world’s active volcanoes are concentrated in areas which coincide with plate margins. Not all volcanoes, however, are associated with plate margins. Some occur in continental interiors such as those in east Africa.
Some Active Volcanoes:
Cotopaci(1975) : Cotopaxi is one of the highest active volcanoes in the world, reaching a height of 5,897 m (19,347 ft) and lcated in Ecuador
Sangay: Sangayis one of the world's most active volcanoes. It is located in the South America of Ecuador and reaching height 5,230.
Klyuchveskaya (1974): Located in Kamchatka, the Klyuchevskaya Sopka is Eurasia’s highest active volcano it reaching height 4,850.
Purace (1977): It is one of the most active volcanoes in Colombia. Large explosive eruptions occurred in 1849, 1869, and 1885, and the latest eruption was in 1977.
Mauna Loa(1975): Location in mid Pacific in Hawaii reaching its height 4,170.
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