Tephrite

[tefrait]

Definition

(n.) An igneous rock consisting essentially of plagioclase and either leucite or nephelite, or both.

Typist: Silvia

Definition

n. a name applied to certain modern volcanic rocks.—adj. Tephrit′ic.—ns. Teph′ritoid a variety of tephrite; Tephi′roite a reddish silicate of manganese.

Editor: Noreen