Andesite magma commonly erupts from stratovolcanoes as thick lava flows, some reaching several kilometers in length. Andesite magma can also generate strong explosive eruptions to form pyroclastic flows and surges and enormous eruption columns. Andesites erupt at temperatures between 900° and 1100°C.
The word "andesite" is derived from the Andes Mountains, located along the western edge of South America, where andesite rock is common. Andesites occur in composite volcanic cones associated with convergent plate margins.
Related category• GEOLOGY AND PLANETARY SCIENCE
Source: U.S. Geological Survey
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