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A granitic rock composed of quartz and mica
Answer for the clue "A granitic rock composed of quartz and mica ", 7 letters:
greisen
Word definitions for greisen in dictionaries
WordNet
Word definitions in WordNet
n. a granitic rock composed of quartz and mica
Wiktionary
Word definitions in Wiktionary
n. (context geology English) A highly altered granitic rock containing quartz and mica
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Greisen \Grei"sen\, n. (Min.) A crystalline rock consisting of quarts and mica, common in the tin regions of Cornwall and Saxony.
Wikipedia
Word definitions in Wikipedia
Greisen is a highly altered granitic rock or pegmatite . Greisen is formed by self-generated alteration of a granite and is a class of endoskarn . Greisens appear as highly altered rocks, partly coarse, crystalline granite, partly vuggy with miarolitic ...