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A form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements
Answer for the clue "A form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements ", 9 letters:
pegmatite
Word definitions for pegmatite in dictionaries
WordNet
Word definitions in WordNet
n. a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Pegmatite \Peg"ma*tite\, n. [From Gr. ? something fastened together, in allusion to the quartz and feldspar in graphic granite: cf. F. pegmatite. See Pegm .] (Min.) Graphic granite. See under Granite . More generally, a coarse granite occurring as vein ...
Wiktionary
Word definitions in Wiktionary
n. A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally with muscovite and/or biotite mica. Often contains other minerals, which may be of economic importance. Pegmatite is chemically identical to granite, ...
Wikipedia
Word definitions in Wikipedia
A pegmatite is a holocrystalline , intrusive igneous rock composed of interlocking phaneritic crystals usually larger than 2.5 cm in size (1 inch); such rocks are referred to as pegmatitic . The word pegmatite derives from Homeric Greek , πεγνυμι ( pegnymi ...
Usage examples of pegmatite.
USE-trained geologists map the pegmatite fields of Sweden, the USE and Sweden will presumably import muscovite mica from Russia, or possibly, India.
But the whole area was overlain by thousands of feet of Miocene lava flows and of course it was geological insanity to look there for a pegmatite vein.
The rock was stained red, with veins of white quartzite and schist, the first sign of an underlying pegmatite structure.
They consist chiefly of granulitic quartzose schists and felspathic gneisses, permeated in places by strings and veins of pegmatite.