Ijolite
_(14822252052).jpg)
Ijolite is an igneous rock consisting essentially of nepheline and augite.[1] Ijolite is a rare rock type of considerable importance from a mineralogical and petrological standpoint. The word is derived from the first syllable of the Finnish words such as Iivaara, Iijoki · and Ii, all geographical names in Finland, and the Ancient Greek Xiflos, a stone. Ijolite occurs in various parts of the Kainuu region of eastern Finland and in the Kola Peninsula of northwest Russia on the shores of the White Sea.[2] Ijolite was first defined and named by Finnish geologist Wilhelm Ramsay.[3]
The
A leucite-augite rock, resembling ijolite except in containing leucite in place of nepheline, is known to occur at Shonkin Creek, near Fort Benton, Montana, and was earlier called missourite,[2] but is now regarded as a variety of leucitite.[4]
References
- S2CID 135266142.
- ^ a b c Chisholm 1911.
- ^ Lindberg, Johan (January 19, 2011). "Ramsay, Wilhelm". Uppslagsverket Finland (in Swedish). Retrieved November 30, 2017.
- ISBN 978-3-642-67552-2.)
{{cite book}}: CS1 maint: multiple names: authors list (link
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Ijolite". Encyclopædia Britannica. Vol. 14 (11th ed.). Cambridge University Press. p. 298.
