1. Plural of dacite; a type of volcanic rock that is intermediate in composition between andesite and rhyolite, typically light-colored and fine-grained.
Usage: geology; technical

Examples

• Dacites are commonly found in volcanic regions around the Pacific Ring of Fire.
• The mountain's composition includes both basalts and dacites from different eruption periods.
• Geologists identified dacites in the rock samples collected from the volcano.
• Dacites typically contain feldspar and quartz as primary minerals.
• The dacites in this region show evidence of explosive volcanic activity.