Amygdales sentence example

amygdales
  • The amygdales are three or four inches long and about three-eighths of an inch in diameter.
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  • Chalcedony occurs as a secondary mineral in volcanic rocks, representing usually the silica set free by the decomposition of various silicates, and deposited in cracks, forming veins, or in vesicular hollows, forming amygdales.
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  • It is not infrequently found in serpentine, and in basic eruptive rocks, where it occurs as veins and in amygdales.
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