Lapilli

Description

A size classification for small rock 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.)

Authority

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

• at http://www.wikipedia.com, Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: Lapilli (accessed March 2010)