Lamprophyre definition

lămprə-fīr
A dark igneous rock, having porphyritic texture, in which both the phenocrysts and the matrix consist of hornblende, pyroxene, and biotite.
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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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(geology) An uncommon, small-volume ultrapotassic igneous rock primarily occurring as dikes, lopoliths, laccoliths, stocks and small intrusions.
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Other Word Forms

Noun

Singular:
lamprophyre
Plural:
lamprophyres

Origin of lamprophyre

  • German Lamprophyr Greek lampros clear (from lampein to shine) French porphyre porphyry (from Old French porfire porphyry)

    From American Heritage Dictionary of the English Language, 5th Edition

  • Ancient Greek λαµπρός (laµpros) (lamprós) = "bright" and φύρω (phurō) (phýro) = "to mix".

    From Wiktionary