armoured lapilli

GLOSSARY OF VOLCANIC TERMS
A type of accretionary lapilli composed of a crystal, pumice, or lithic fragment core which is surrounded by a rim of fine to coarse ash (McPhie et al., 1993, p. 29).

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

Look at other dictionaries:

  • Lapilli — is a size classification term for tephra, which is material that falls out of the air during a volcanic eruption. Lapilli (singular: lapillus) means little stones in Latin. They are in some senses similar to ooids or pisoids in calcareous… …   Wikipedia

  • Roman Republic — See also: Roman Republic (18th century) and Roman Republic (19th century) Roman Republic Official name (as on coins): Roma after ca. 100 BC: Senatus PopulusQue Romanus ( The Senate and People of Rome ) …   Wikipedia

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