Rhyolitic magma is a type of volcanic rock that is rich in silica, typically containing over 70% silica content. This high silica concentration makes it very viscous, meaning it flows slowly compared to other types of magma. Rhyolitic magma is often associated with explosive volcanic eruptions, as the thick consistency can trap gases, leading to increased pressure. When rhyolitic magma erupts, it can form various volcanic features, such as pumice and obsidian. These eruptions can create large calderas, which are depressions formed when the magma chamber empties. Rhyolitic magma is commonly found in continental volcanic arcs and hotspots, contributing to the formation of volcanic mountains.