One of the mysteries of the English language finally explained.
A porphyritic igneous rock consisting of a fine-grained feldspathic groundmass with phenocrysts chiefly of biotite.
- ‘Remelting of these metasomites produced the Gardar lamprophyre magmas.’
- ‘It has also been found in silica-poor igneous rocks, such as syenite, nepheline syenite, serpentinite, and lamprophyre.’
- ‘Subordinate volumes of carbonatite and lamprophyre magmas are also present.’
- ‘Melts of these metasomites were volatile rich and hence ascended rapidly through the lithosphere, forming the lamprophyre magmas.’
- ‘The only known igneous rocks in the area are Permian periodotite and lamprophyre dikes as well as diatremes of ultramafic composition associated with the Fluorite district.’
Late 19th century: from Greek lampros ‘bright, shining’ + porphureos ‘purple’.
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