greisen

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Greisen
Greisen is a highly altered granitic rock or pegmatite. Greisen is formed by autogenic alteration of a granite and is a class of endoskarn.Greisens appear as highly altered rocks, partly coarse, crystalline granite, partly vuggy with miarolitic cavities, disseminated halide minerals such as fluorite, and occasionally metallic oxide and sulfide ore minerals, borate minerals (tourmaline) and accessory phases such as sphene, beryl, topaz, etcetera.
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WordNet 2.0 DictionaryDownload this dictionary
greisen
Noun
1. a granitic rock composed of quartz and mica
(hypernym) rock, stone



Webster's Revised Unabridged Dictionary (1913)Download this dictionary
Greisen
(n.)
A crystalline rock consisting of quarts and mica, common in the tin regions of Cornwall and Saxony.
  

Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About

English To Urdu LughatDownload this dictionary
greisen
Eng: greisen
Urdu: گریسن ۔ سیکسونی کی قلعی کی کانوں میں پائی جانے والی قَلمی چٹان جو بیشتر کوارٹز اور ابرق کی بَنی ہوتی ہے ۔
  

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