trowlesworthiten.
/ˈtrəʊlzwəθʌɪt/ Mineralogy.
An altered granite in which fluorite, orthoclase, and tourmaline have taken the place of the original quartz, feldspar, and mica.
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the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > plutonic rocks > granite > varieties of
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ophthalmite1811
protogine1823
pegmatite1824
potash-granite1845
beresite1849
granitite1875
greisen1878
trowlesworthite1884
microgranite1888
charnockite1893
alaskite1900
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plagiogranite1959
1884 Bonney in Q. Jrnl. Geol. Soc. 40 7 A rock-specimen exhibited by Mr. R. N. Worth,..and by him named Trowlesworthite. It consisted chiefly of reddish orthoclase, purple fluor, and black schorl, in intimate association with quartz, and was found..as a loose block on Trowlesworthy Tor.
This entry has not yet been fully updated (first published 1915; most recently modified version published online June 2018).
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n.1884