shonkiniten.
/ˈʃɒŋkɪnʌɪt/ Geology.
A dark granular form of syenite consisting largely of augite and orthoclase.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > plutonic rocks > syenite > varieties of
miaskite1840
uralite-syenite1868
foyaite1878
nepheline-syenite1885
pulaskite1891
nordmarkite1892
larvikite1895
shonkinite1895
1895 Weed & Pirsson in Bull. Geol. Soc. Amer. VI. 415 For this type of rock, then, we propose the name of shonkinite,..and shonkinite we define as a granular plutonic rock consisting of essential augite and orthoclase, and thereby related to the syenite family.
a1928 B. N. Peach & J. Horne Chapters Geol. Scotl. (1930) iv. 112 A discontinuous zone of fine-grained shonkinite and pulaskite.
1951 F. J. Turner & J. Verhoogen Igneous & Metamorphic Petrol. viii. 169 The syenite undoubtedly is a differentiate derived from a parent shonkinite magma.
1978 S. R. Nockolds et al. Petrol. for Students v. 61 Other shonkinites from the Highwood Mountains and from the Bearpaw Mountains, Montana, may have a little plagioclase.
Derivatives
shonkiˈnitic adj. having the character or consisting of shonkinite.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > plutonic > syenite
syenitic1799
shonkinitic1900
nordmarkitic1938
1900 Bull. Geol. Soc. Amer. 11 395 The relations of the ‘fine grained’ (shonkinitic) syenite to the leucite-porpyhry are uncertain.
1930 B. N. Peach & J. Horne Chapters Geol. Scotl. 113 The degree of alteration is less in the more shonkinitic patches.
1943 S. J. Shand Eruptive Rocks (ed. 2) xiv. 259 There are no lavas of shonkinitic composition.
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2021).
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n.1895