noun
- a fine-grained volcanic rock that is rich in silica and typically light in color
Usage: geology
Examples
- The geologist identified the sample as rhyolite based on its light color and glassy texture.
- Rhyolite forms when silica-rich magma cools quickly at the Earth’s surface.
- The ancient volcanic eruption left behind layers of rhyolite and obsidian.
- Many rhyolite formations can be found in Yellowstone National Park.
- The mountain’s peak was composed primarily of weathered rhyolite.
- Students collected rhyolite specimens during their field trip to the quarry.