Difference between revisions of "Mafic minerals"
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== Description == | == Description == | ||
| − | A class of dense, dark-color silicaceous minerals that are high in [[iron]], [[magnesium]], [[calcium]], and [[sodium]. The high iron content of mafic clays are responsible for the surface crystalline formations produced in oil spot ceramic glazes. Examples of mafic rocks are [[basalt]] and [[gabbro]]. They may include [[olivine]], [[pyroxene]], [[amphibole]], [[biotite]], [[augite]], and calcium-rich [[plagioclase|feldspars]]. | + | A class of dense, dark-color silicaceous minerals that are high in [[iron]], [[magnesium]], [[calcium]], and [[sodium]]. The high iron content of mafic clays are responsible for the surface crystalline formations produced in oil spot ceramic glazes. Examples of mafic rocks are [[basalt]] and [[gabbro]]. They may include [[olivine]], [[pyroxene]], [[amphibole]], [[biotite]], [[augite]], and calcium-rich [[plagioclase|feldspars]]. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 14:42, 21 January 2014
Description
A class of dense, dark-color silicaceous minerals that are high in Iron, Magnesium, Calcium, and Sodium. The high iron content of mafic clays are responsible for the surface crystalline formations produced in oil spot ceramic glazes. Examples of mafic rocks are Basalt and Gabbro. They may include Olivine, Pyroxene, Amphibole, Biotite, Augite, and calcium-rich feldspars.
Synonyms and Related Terms
mafic clay; minerais máficos (Port.)
Authority
- Submitted information Comment: José Delgado Rodrigues, LNEC, 2009.
- External source or communication Comment: Submitted information: Fred Gamble, October 2007.
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: 'Mafic' (accessed October 5, 2007)
- Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998