ijoliten.
/ˈiːjəʊlʌɪt/ Geology.
A plutonic igneous rock consisting essentially of nepheline and pyroxene and containing no felspar.
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ijolite1897
urtite1909
1897 A. Harker Petrol. (ed. 2) 52 The ‘ijolite’ of Ramsay and Berghell from Finland, a nepheline-pyroxene-rock free from felspar but sometimes rich in garnet.
1962 W. T. Huang Petrol. iv. 139 Much of the ijolite on Alnö Island, Sweden, and Magnet Cove, Arkansas, contains abundant melanite garnet.
Derivatives
ijoˈlitic adj. resembling or of the nature of ijolite.
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the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > plutonic > ijolite
ijolitic1938
1938 Mineral Abstr. 7 36 Masses of limestone and ijolitic intrusives.
1954 H. Williams et al. Petrogr. iv. 72 Most of these ijolitic rocks..owe their characteristics largely to contamination of magma by assimilation of limestone.
1966 R. L. Johnson in Tuttle & Gittins Carbonatites i. 221 Here there are a number of carbonatite complexes, which include granites, syenites, nepheline syenites and small amounts of ijolitic rocks within their limits.
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2021).
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