Rhyolite is a type of volcanic rock that forms from the rapid cooling of lava rich in silica. It is typically light in color, ranging from white to pink or gray, and has a fine-grained texture. Rhyolite is often associated with explosive volcanic eruptions, which can create impressive landforms like calderas and volcanic domes. This rock is commonly found in areas with a history of volcanic activity, such as the Yellowstone National Park in the United States. Rhyolite can contain various minerals, including quartz and feldspar, which contribute to its unique appearance and properties.