Question

andesitic lava tends to erupt from volcanoes that form along subduction zones. what magma forming process creates andesitic lava?

Answer 1

The magma forming process that creates andesitic lava is called fractional crystallization.

Step-by-step explanation:

The magma forming process that creates andesitic lava is called fractional crystallization. This process happens when a magma chamber cools and crystallizes, and the different types of minerals that form crystallize at different rates. The slower-crystallizing minerals tend to sink to the bottom of the magma chamber, while the faster-crystallizing minerals rise to the top. When the magma is erupted, it is richer in the faster-crystallizing minerals, which gives it an andesitic composition.