Online Encyclopedia

Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.

IJOLITE (derived from the first sylla...

Online Encyclopedia
Originally appearing in Volume V14, Page 298 of the 1911 Encyclopedia Britannica.
Spread the word: del.icio.us del.icio.us it!

See also:

IJOLITE (derived from the first syllable of the Finnish words Jiwaru, Jijoki, &c., See also:common as See also:geographical names in the See also:Kola See also:peninsula, and the Gr. XLOos, a See also:stone)  , a See also:rock consisting essentially of See also:nepheline and See also:augite, and of See also:great rarity, but of considerable importance from a mineralogical and petrographical standpoint . It occurs in various parts of the See also:Kola See also:peninsula in See also:north See also:Finland on the shores of the See also:White See also:Sea . The See also:pyroxene is morphic, yellow or See also:green, and is surrounded by formless areas of nepheline . The See also:accessory minerals are See also:apatite, cancrinite, See also:calcite, titanite and jiwaarite, a dark-See also:brown titaniferous variety of melanite-See also:garnet . This rock is the plutonic and holo-crystalline analogue of the nephelenites and nepheline-dolerites; it bears the same relation to them as the nepheline-syenites have to the phonolites . It is See also:worth mentioning that a leuciteaugite rock, resembling See also:ijolite except in containing See also:leucite in See also:place of nepheline, is known to occur at Shonkin See also:Creek, near Fort See also:Benton, See also:Montana, and has been called missourite .

End of Article: IJOLITE (derived from the first syllable of the Finnish words Jiwaru, Jijoki, &c., common as geographical names in the Kola peninsula, and the Gr. XLOos, a stone)
[back]
IIYUWIII9IUIIIIIIIIIIIIIIIUIIIN IIIIIIIUIIII
[next]
IKI

Additional information and Comments

There are no comments yet for this article.
» Add information or comments to this article.
Please link directly to this article:
Highlight the code below, right click and select "copy." Paste it into a website, email, or other HTML document.