Andesitic magma is a type of magma that is intermediate in composition between basaltic and rhyolitic magmas. It is characterized by its high silica content (53-63%) and moderate viscosity.
Here are some key characteristics of andesitic magma:
* High viscosity: This means it is thicker and flows more slowly than basaltic magma, leading to more explosive eruptions.
* Intermediate silica content: This results in the formation of intermediate volcanic rocks, such as andesite.
* Gas content: Andesitic magma can contain a significant amount of dissolved gases, which can be released during eruptions, contributing to their explosiveness.
The andesitic magma of Mount Cleveland has been responsible for several explosive eruptions in its history.