lamprophyre
any dark intrusive rock in which dark minerals occur both as phenocrysts and as groundmass.
Origin of lamprophyre
1Other words from lamprophyre
- lam·pro·phyr·ic [lam-pruh-fir-ik], /ˌlæm prəˈfɪr ɪk/, adjective
Words Nearby lamprophyre
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use lamprophyre in a sentence
Each variety of lamprophyre may and often does contain all four minerals but is named according to the two which preponderate.
It is supposed that they did not crystallize in the lamprophyre dike but in some way were caught up by it.
In Fergus County, Montana, they are mined from decomposed dikes of lamprophyre (a basic igneous rock).
The Economic Aspect of Geology | C. K. LeithThey are found mostly as loose crystals in gravel, but are known also in igenous rocks like andesite and lamprophyre.
British Dictionary definitions for lamprophyre
/ (ˈlæmprəˌfaɪə) /
any of a group of basic igneous rocks consisting of feldspathoids and ferromagnesian minerals, esp biotite: occurring as dykes and minor intrusions
Origin of lamprophyre
1Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for lamprophyre
[ lăm′prə-fīr′ ]
A dark igneous rock, having a porphyritic texture in which both the phenocrysts (larger crystals) and the matrix consist primarily of pyroxene, hornblende, and biotite.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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