tephrite

tephrite

[tef-rahyt]
noun Petrography.
a basaltic rock consisting essentially of pyroxene and plagioclase with nepheline or leucite.

Origin:
1875–80; < Greek tephr(ós) ash-colored + -ite1

tephritic [tef-rit-ik] , adjective
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World English Dictionary
tephrite (ˈtɛfraɪt)
 
n
a variety of basalt containing plagioclase, augite, and a feldspathoid, commonly nepheline, or leucite
 
[C17: from Greek tephros, from tephra ashes; see -ite1]
 
tephritic
 
adj

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