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lapilli

lapilli Pyroclastic fragments or tephra ranging in size from 2 to 64 mm. Lapilli may be composed of primary magmatic material (e.g. pumice), accessory lithic material, accidental lithic material, or accretions of wet ash-size material (accretionary lapilli). The size-term ‘lapilli’ is usually applied to the lithological clast type to give descriptive terms, e.g. ‘pumice lapilli’ or ‘accessory lithic lapilli’.

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"lapilli." A Dictionary of Earth Sciences. . Encyclopedia.com. 21 Oct. 2017 <http://www.encyclopedia.com>.

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"lapilli." A Dictionary of Earth Sciences. . Retrieved October 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/lapilli

lapilli

lapilli fragments of stone from a volcano. XVIII. —pl. of It. lapillo— L. lapillus, dim. of lapis stone.

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"lapilli." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 21 Oct. 2017 <http://www.encyclopedia.com>.

"lapilli." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (October 21, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/lapilli

"lapilli." The Concise Oxford Dictionary of English Etymology. . Retrieved October 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/lapilli