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greisen

   Also found in: Encyclopedia, Wikipedia 0.02 sec.
grei·sen  (grzn)
n.
A granitic rock composed chiefly of quartz and mica.

[German, from greissen, to split.]

greisen [ˈgraɪzən]
n
(Earth Sciences / Geological Science) a light-coloured metamorphic rock consisting mainly of quartz, white mica, and topaz formed by the pneumatolysis of granite
[from German, from greissen to split]
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.greisen - a granitic rock composed of quartz and mica
rock, stone - material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"


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2002) and Grundmann (2002) divided emerald deposits into the following categories: pegmatites without schist, pegmatite and greisen with schist, schists without pegmatites, and black shales with veins and breccias.
Season-ending injury occurred on last play of the first half in the Sun Bowl when he was hit by blitzing linebacker Nick Greisen while attempting a Hail Mary pass.
 
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