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saussurite
[ saw-suh-rahyt ]
noun
- a mineral aggregate of albite, zoisite, and other calcium aluminum silicates, formed by alteration of plagioclase feldspars in igneous rocks.
Other Words From
- saus·su·rit·ic [saw-s, uh, -, rit, -ik], adjective
Word History and Origins
Origin of saussurite1
Example Sentences
Saussurite, saw-sū′rīt, n. a fine-grained compact mineral, of grayish colour.—adj.
Equally characteristic of the gabbros is the alteration of the felspars to cloudy, semi-opaque masses of saussurite.
Some authors believe that the development of saussurite from felspar is also dependent on pressure rather than on weathering, and an analogous change may affect the olivine, replacing it by talc, chlorite, actinolite and garnet.
Secondary mica is also a common result of alteration, and among other products are pinite, epidote, saussurite, chlorite, wollastonite and various zeolites.
It may be mentioned that there is a mineral closely allied to jade called "Saussurite," discovered by the great geologist whose name it bears near Monte Rosa, and since found on the borders of the Lake of Geneva, near Genoa, and in Corsica.
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