camptoniten.
/ˈkamptənʌɪt/ Geology.
Any of a group of dark-coloured, usually porphyritic dike-rocks resembling basalt and typically consisting of phenocrysts of hornblende or barkevikite in a matrix of plagioclase.
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the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > porphyrite rock > varieties of
red rock1721
oriental verd-antique1852
kersanton1862
kersantite1868
uralite-porphyry1868
monchiquite1891
vogesite1891
camptonite1895
hedrumite1896
wyomingite1897
spessartite1908
rhyodacite1913
rhyolite1932
1895 J. D. Dana Man. Geol. (ed. 4) 87 Camptonyte.—Rock resembling diabase and doleryte. Consisting of hornblende (as an original mineral of the rock) and probably anorthite.
1901 Nature 19 Sept. 513/1 The sills of camptonite and felsite intrusive in the Cambrian rocks.
1961 F. H. Hatch et al. Petrol. Igneous Rocks (ed. 12) iv. ii. 475 Localized intrusions of basic lamprophyric rocks including camptonites and monchiquites occur in or near the Ayrshire vents.
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).
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n.1895