Q:

What is a light colored igneous rock with high silica content?

A:

Quick Answer

Granite and rhyolite are two of the most commonly found igneous rocks that possess a high silica content. They are formed through the cooling of magma above or below the Earth's surface.

Continue Reading

Full Answer

Granite is found below the Earth's surface and is composed primarily of lightly-colored quartz and feldspar minerals. It has a coarse grain type with typically large crystals. Rhyolite is considered an extrusive counterpart to granite, as it contains a high amount of feldspar and quartz and has a similar appearance. It forms above ground from highly viscous lava and displays a fine grain type. Rhyolite typically has extremely small crystals due to a fast cooling process that prevents the crystals from growing.

Learn more about Geology

Related Questions

Explore