noun
- plural of amygdale; almond-shaped cavities in volcanic rock filled with secondary minerals
Usage: geological
Examples
- The geologist identified several amygdales filled with quartz in the basalt sample.
- Amygdales in the volcanic rock contained beautiful crystals of zeolite minerals.
- The presence of amygdales indicated that the lava had contained gas bubbles when it cooled.
- Students examined the amygdales under magnification to identify the secondary minerals.
- The amygdales gave the ancient lava flow a distinctive spotted appearance.