syeniten.
/ˈsʌɪənʌɪt/, U.S. /ˈsaɪəˌnaɪt/ Mineralogy.
A crystalline rock allied to granite, mainly composed of hornblende and feldspar, with or without quartz.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > plutonic rocks > syenite
syenite1794
1794 R. Kirwan Elements Mineral. (ed. 2) I. 341 Sienite. An aggregate of quartz, hornblende, and felspar.
1813 R. Bakewell Introd. Geol. v. 99 The transitions by which granite passes into sienite, and the latter into porphyry, trap, and basalt.
1842 A. Sedgwick in Hudson's Guide Lakes (1843) 230 The red syenite of Ennerdale and Buttermere.
1854 J. D. Hooker Himalayan Jrnls. II. xxix. 297 Enormous rounded blocks of syenite.
Compounds
attributive and in other combinations.
ΚΠ
1831 H. T. De la Beche Geol. Man. v. 262 Granite and syenite mountains.
1840 R. Griffith in Trans. Geol. Soc. 5 180 (caption) Syenite veins passing through mica slate.
1876 E. E. Frewer tr. J. Verne Adventures Three Englishmen viii. 66 Its [sc. the baobab's] syenite-coloured bark gave it a peculiar appearance.
This entry has not yet been fully updated (first published 1919; most recently modified version published online March 2022).
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