1. A light-colored volcanic rock of intermediate composition, containing feldspar and quartz as primary minerals.
Usage: geology; technical

Examples

• Dacite is commonly found in volcanic regions around the Pacific Ring of Fire.
• The mountain's slopes were composed largely of dacite lava flows from ancient eruptions.
• Geologists identified the rock sample as dacite based on its mineral composition and color.
• Dacite typically forms when magma cools at a moderate rate, creating a fine-grained texture.
• The volcanic cone was built up by repeated eruptions of dacite and related igneous materials.