heumiten.
/ˈhjuːmʌɪt/ Geology.
A brownish-black hypabyssal dike-rock containing alkali feldspars, biotite, and barkevikite, with nepheline, sodalite, and other rocks.
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the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > hypabyssal rocks
picrite1868
tinguaite1890
grorudite1896
hedrumite1896
heumite1901
plumasite1903
ophiolite1937
1901 Jrnl. Chem. Soc. 80 ii. 169 Heumite is the name given to a dyke-rock from Heum, consisting of hornblende and felspar, with some biotite, and smaller amounts of nephelite, sodalite, diopside, &c.
1938 A. Johannsen Descr. Petrogr. Igneous Rocks IV. 170 The heumite from Brathagen..contains essential soda-microcline and soda-orthoclase with a little andesine.
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).
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n.1901