Webshonkinite shonkinite (English)Origin & history Shonkin + -ite, after the type locality at Shonkin Sag in the Highwood Mountains of north-central Montana. Noun shonkinite (countable and uncountable; pl. shonkinites) A kind of mafic foidal syenite WebPeakList Visible Ref. Code Score Compound Name Displacement [°2Th.] Scale Factor Chemical Formula * 00-019-0239 63 Diopside, syn 0.000 0.746 Ca Mg ( Si O3 )2 * 00-016-0344 42 Phlogopite-1\ITM\RG, syn 0.000 0.240 K Mg3 ( Si3 Al ) O10 F2
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Webplural of shonkinite ... Definition from Wiktionary, the free dictionary Shonkinite is an intrusive igneous rock found in few places in the world. It is unique in having low silica, feldspathoid minerals, and large blocky crystals of black augite. It makes up much of the hard dark grey rock comprising certain mountains and buttes in Montana that are remnants of laccoliths and stocks, such as … See more Shonkinite is an intrusive igneous rock. More specifically, it is a mafic foidal (feldspathoid bearing) syenite, a holocrystalline (completely crystalline) intrusive rock which, in the restricted sense , is composed of … See more In central Montana buttes of shonkinite are capped with white layers of syenite. There appear round globes of syenite at the boundary which suggest that the less dense syenite float … See more The rock gets its name from the type locality at Shonkin Sag in the Highwood Mountains of north-central Montana. See more • The Adel Mountains Volcanic Field in north-central Montana • Mountain Pass, California. • India in the Salem Block in the Southern Granulite Terrane and the Elchuru alkaline … See more certified meditation and mindfulness teacher
What does shonkinite mean? - Definitions.net
WebAlkaline igneous rocks form from cooling of magmas derived by small degrees of partial melting of rocks in the Earth's mantle. WebShoshonite is a type of igneous rock. More specifically, it is a potassium -rich variety of basaltic trachyandesite, [1] composed of olivine, augite and plagioclase phenocrysts in a … WebShonkinite is a rare, dark-coloured and intrusive igneous rock which contains augite and orthoclase feldspar as its primary constituents. Shonkinite is available in brown, buff, cream, green, grey, pink, white … buy used high school textbooks