rhyolite
/ˈraɪəˌlaɪt/
noun
- A light-colored volcanic rock with a fine-grained texture, similar to granite in composition.
- The canyon walls were made of rhyolite, giving them a pinkish hue.
- Rhyolite is often used in construction because it is hard and durable.
- Geologists collected samples of rhyolite to study the volcano's history.