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A size classification for small pyroclastic fragments of Lava. Lapilli means "little stones" in Latin. Formed by droplets of molten lava, cooled in the air, the stones range in size from 2 to 64 mm. Lapilli occur in spheroid, teardrop, dumbbell, or button-like shapes.

Synonyms and Related Terms

lapillus (singular); lapilli (Port.)

Sources Checked for Data in Record

  • Submitted information Comment: José Delgado Rodrigues, LNEC, 2009

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