Friday, October 3, 2008

Polygenetic volcanic field

A polygenetic volcanic field is a volcanic field of sprinkled volcanic vents. These volcanic fields, containing many polygenetic volcanoes, are renowned for having more than one eruptive event from the identical vent(s), quite than the more ordinary monogenetic volcanic field. Polygenetic volcanic fields usually occur where there is a sophisticated magma chamber. These volcanic fields may demonstrate lithological discontinuities due to main changes in magma chemistry, volcanotectonic events, or extended erosional intervals, and may last >10 million year period.

Unlike monogenetic volcanic fields, volcanoes in polygenetic fields arrive at huge sizes, such as Mauna Loa, which is the world's main active volcano.

Some types of volcanoes comprise shield volcanoes, stratovolcanoes, complex volcanoes, somma volcanoes and calderas.

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