Our navigation bar is loading . . .

 


 

Jesus Christ Saves Ministries

Helping San Diego, California and beyond since 1997.  




 

JCSM's Top 1000 Christian Sites - Free Traffic Sharing Service!


Do you need volunteer, community service, work, military or court hours?

Click here and add this page to your favorites!

Return to the JCSM Study Center!

Encyclopedia Britannica



BOROLANITE

This article appears in Volume V04, Page 267 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: BLA-BOS
BOROLANITE , one of the most remarkable rocks of the British Isles, found on the shores of Loch Borolan in
Sutherland
 -'shire, after which it has been named. In this locality there is a considerable area of granite
rich
  in red alkali felspar, and passing, by diminution in the amount of its
quartz
 , into
quartz
 -syenites (nordmarkites) and syenites. At the margins of the outcrop patches of nepheline-
syenite
  occur; usually the nepheline is decomposed, but occasionally it is well-preserved; the other ingredients of the
rock
  are brown garnet (melanite) and aegirine. The abundance of melanite is very unusual in igneous rocks, though some syenites, leucitophyres, and aegirine-felsites resemble borolanite in this respect. In places the nephelinesyenite assumes the form of a dark
rock
  with large rounded white spots. These last consist of an intermixture of nepheline or
sodalite
  and alkali-felspar. From the analogy of certain leucitesyenites which are known in Arkansas, it is very probable that these spots represent
original
  leucites which have been changed into aggregates of the above-named minerals. They resemble leucite in their shape, but have not yet been proved to have its crystalline outlines. The " pseudo-leucites," as they have been called, measure one-
quarter
  to three-quarters of an inch across. The dark matrix consists of biotite, aegirine-augite and melanite. Connected with the borolanite there are other types of nepheline-
syenite
  and pegmatite. In
Finland
 , melanitebearing nepheline rocks have been found and described as Ijolite, but the only other locality for melanite-leucite-syenite is Magnet
Cove
  in Arkansas. (J. S. F.)


End of Article: BOROLANITE


If you wish, you can link directly to this article.
<a href="http://jcsm.org/StudyCenter/Encyclopedia/BLA_BOS/BOROLANITE.html">
BOROLANITE
</a>
(Previous)
BORODINO 		(Next)
BORON (symbol B, atomic weight I I)

 


 
 


JCSM was founded in 1997 and exists to help the community and bring people into a life-changing and productive relationship with Jesus Christ. JCSM offers over 200,000 free web pages, including its weekly inspirational emails that were sent continuously for over a decade.

Jesus Christ Saves Ministries
P.O. Box 9297
San Diego, CA  92169
1-888-887-0417 or Email

JCSM is a 501(c)(3), non-profit organization. Copyright © 1997-2012.
 

 

Sponsored Advertisements

Online First Aid and CPR Certification  .  DHA Solutions  .  PB Happy Hour Specials  .  Improvising Made Easy For Guitar and Bass  .  The Skeptic's Annotated Bible: Corrected and Explained  .  Home Equity Loans  .  First Aid and CPR Online  .  San Diego Music Lessons  .  10,000 Wise Quotes and Spiritual Sayings  .  Blow Up Your Site (For Free!)  .  San Diego DUI Lawyers  .  Jason Gastrich  .  Jordan Faith Gastrich  .  Divorce Secrets Revealed  .  Post Your Ad Link Free  .  San Diego Soccer Training  .  JCSM  .  Download Sermons  .  Custom Religious Banners, Build A Sign  .  Christian Singles Dating  .  Christian T-Shirts  .  Healing Christian Prayer  .  Bumper Authority  .  Personalized Blogs and Email  .  San Diego Haircuts  .  The Do the Math Diet  .  Stop Twitter Spam  .  Christian Conservative Work at Home Network  .  The Website of the Lord