adjective
- of, relating to, or composed of andesite, a fine-grained volcanic rock intermediate in composition between basalt and rhyolite
Usage: geology; technical
Examples
- The andesitic lava flows from the volcano cooled into dark, dense rock.
- Geologists identified the mountain as andesitic in composition based on mineral analysis.
- Andesitic magma typically erupts at subduction zones around the Pacific Ring of Fire.
- The andesitic rocks in this region show evidence of ancient volcanic activity.
- This andesitic sample contains plagioclase feldspar and pyroxene minerals.