noun
- small cavities in volcanic rock that are filled with secondary minerals
Usage: geology
Examples
- The basalt contained numerous amygdules filled with quartz and calcite.
- Geologists identified amygdules in the ancient lava flow.
- The amygdules gave the volcanic rock a distinctive spotted appearance.
- Zeolite minerals commonly fill amygdules in oceanic basalts.
- The size of amygdules can indicate the cooling rate of the lava.