essexiten.

/ˈɛsɪksʌɪt/

Etymology: < the name of Essex County, Massachusetts, where the first examples were found and described, + -ite suffix¹.

Geology.

Any crystalline igneous rock consisting of labradorite or similar plagioclase, alkali feldspar, and nepheline, together with various mafic minerals.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > other igneous

clay-stone1777

variolite1781

pyroxenite1845

aplite1862

anorthosite1863

teschenite1866

yellow ground1883

kimberlite1887

sanidinite1887

websterite1890

essexite1891

monzonite1895

missourite1896

theralite1898

heronite1899

kentallenite1900

carbonatite1924

wonderstone1936

1891 J. H. Sears in Bull. Essex (Mass.) Inst. 23 146 I would, therefore, propose the name of Essexite for this ancient elæolite-zircon-syenite rock.

1963 W. A. Deer et al. Rock-forming Minerals II. 109 Titanaugites are the typical pyroxenes of basic alkaline rocks, e.g. teschenite, essexite and nepheline dolerite.

1989 Encycl. Brit. IV. 567/1 As the proportion of nepheline increases, essexite grades into theralite.

Derivatives

esseˈxitic adj. of or pertaining to essexite.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > other igneous

aplitic1877

alkalic1902

monzonitic1909

essexitic1927

1927 Trans. Royal Soc. Edinb. 55 504 We regard the mugearitic and essexitic intrusions of the Dalmahoy syncline as hypabyssal expressions of the magma which gave rise to the accompanying effusive mugearites and allied basalts.

1947 Proc. Indian Acad. Sci. A. 25 75 It is deduced from these studies that the original magma is probably an ultrabasic (essexitic or picritic) type.

1974 Geol. Mag. 111 343 The sill is of essexitic composition.

This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2020).

单词	essexite
释义	essexiten. /ˈɛsɪksʌɪt/ Etymology: < the name of Essex County, Massachusetts, where the first examples were found and described, + -ite suffix¹. Geology. Any crystalline igneous rock consisting of labradorite or similar plagioclase, alkali feldspar, and nepheline, together with various mafic minerals. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > other igneous clay-stone1777 variolite1781 pyroxenite1845 aplite1862 anorthosite1863 teschenite1866 yellow ground1883 kimberlite1887 sanidinite1887 websterite1890 essexite1891 monzonite1895 missourite1896 theralite1898 heronite1899 kentallenite1900 carbonatite1924 wonderstone1936 1891 J. H. Sears in Bull. Essex (Mass.) Inst. 23 146 I would, therefore, propose the name of Essexite for this ancient elæolite-zircon-syenite rock. 1963 W. A. Deer et al. Rock-forming Minerals II. 109 Titanaugites are the typical pyroxenes of basic alkaline rocks, e.g. teschenite, essexite and nepheline dolerite. 1989 Encycl. Brit. IV. 567/1 As the proportion of nepheline increases, essexite grades into theralite. Derivatives esseˈxitic adj. of or pertaining to essexite. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > other igneous aplitic1877 alkalic1902 monzonitic1909 essexitic1927 1927 Trans. Royal Soc. Edinb. 55 504 We regard the mugearitic and essexitic intrusions of the Dalmahoy syncline as hypabyssal expressions of the magma which gave rise to the accompanying effusive mugearites and allied basalts. 1947 Proc. Indian Acad. Sci. A. 25 75 It is deduced from these studies that the original magma is probably an ultrabasic (essexitic or picritic) type. 1974 Geol. Mag. 111 343 The sill is of essexitic composition. This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2020). < n.1891
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