1) Plutonic rock
Found on
https://www.crosswordclues.com/clue/ijolite
Ijolite (derived from the first syllable of the Finnish words Ii-vaara, Iijoki, &c., common as geographical names in Finland, and the Gr. Xiflos, a stone) is an igneous rock consisting essentially of nepheline and augite. Ijolite is a rare rock type of considerable importance from a mineralogical and petrological standpoint. It occurs in various p...
Found on
http://en.wikipedia.org/wiki/Ijolite
intrusive igneous rock that is composed essentially of nepheline and an alkali pyroxene, usually aegirine-augite. It is the plutonic equivalent of ...
Found on
http://www.britannica.com/eb/a-z/i/7
No exact match found.
