lam·pro·phyre (l m pr -f r )n. Any of several intermediate igneous rocks constituting feldspar and ferromagnesium minerals that occur as dikes and minor intrusions. [German Lamprophyr : Greek lampros, clear (from lampein, to shine) + French porphyre, porphyry (from Old French porfire; see porphyry).] |
lamprophyre [ˈlæmprəˌfaɪə]
n
(Earth Sciences / Geological Science) any of a group of basic igneous rocks consisting of feldspathoids and ferromagnesian minerals, esp biotite: occurring as dykes and minor intrusions
[from Greek lampros bright + -phyre, from porphyry]
| lamprophyre (lmpr-fr) 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. |
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