Andesitic Magma | Types of Magma
For this lesson, we'll talk about one known type of magma called andesitic.

Andesitic magma is generated at convergent plate boundaries where the oceanic lithosphere (the outer layer of the Earth composed of the crust and upper mantle) is subducted so that its edge is positioned below the edge of the continental plate or another oceanic plate. (Britannica)
Andesitic magma contains about 60% silica resulting in intermediate viscosity... so the volcanoes it fuels are known to have intermediate eruptions.
Andesitic magma's eruption temperature ranges from 800 to 1000 degrees Celcius, as laboratory measurement and limited field observation indicate. (Tulane University)

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References:
http://www.tulane.edu/~sanelson/Natural_Disasters/volcan&magma.htm
https://www.britannica.com/science/igneous-rock/Classification-of-volcanic-and-hypabyssal-rocks#ref618849
Google (for the pictures)