urtiten.
/ˈəːtʌɪt/ Geology.
A light-coloured crystalline rock of the ijolite series, composed predominantly of nepheline and containing some sodic pyroxene.
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ijolite1897
urtite1909
1909 in Cent. Dict. Suppl.
1921 Trans. Geol. Soc. S. Afr. 24 129 I judge the urtite bodies to be merely segregation veins within ijolite and foyaite.
1955 Brown & Dey India's Min. Wealth (ed. 3) 640 Greenish yellow elæolite from an urtite near Sinkwa, in the Mogok Stone Tract.
This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018).
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n.1909