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dolerite

dolerite (diabase, microgabbro) A dark-coloured, medium-grained igneous rock which contains plagioclase feldspar of labradorite composition and pyroxene of augite or titanaugite composition as essential minerals, and magnetite, titano-magnetite, or ilmenite as accessory minerals. Where olivine also occurs as an additional mineral, the rock is termed an ‘olivine dolerite’. Where quartz occurs as an additional mineral in the groundmass, the rock is termed a ‘quartz dolerite’. Dolerites are the medium-grained equivalents of basalts and, like the basalts, can be divided into alkali and tholeiitic types (see also ALKALI BASALT; and THOLEIITE). Dolerites are commonly found in shallow level intrusions such as dykes, sills, or plugs.

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"dolerite." A Dictionary of Earth Sciences. . Encyclopedia.com. 18 Dec. 2017 <http://www.encyclopedia.com>.

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"dolerite." A Dictionary of Earth Sciences. . Retrieved December 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/dolerite

dolerite

dolerite mineral allied to basalt. XIX. — F. dolérite, f. Gr. dolerós deceptive; so named from the difficulty of discriminating its constituents; see -ITE.

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"dolerite." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 18 Dec. 2017 <http://www.encyclopedia.com>.

"dolerite." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (December 18, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/dolerite-0

"dolerite." The Concise Oxford Dictionary of English Etymology. . Retrieved December 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/dolerite-0

diabase

diabase: see basalt.

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"diabase." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 18 Dec. 2017 <http://www.encyclopedia.com>.

"diabase." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (December 18, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/diabase

"diabase." The Columbia Encyclopedia, 6th ed.. . Retrieved December 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/diabase

diabase

diabase See DOLERITE.

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"diabase." A Dictionary of Earth Sciences. . Encyclopedia.com. 18 Dec. 2017 <http://www.encyclopedia.com>.

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"diabase." A Dictionary of Earth Sciences. . Retrieved December 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/diabase

dolerite

doleriteHamite, samite •marmite • Semite • Vegemite •eremite • Hashemite • Fatimite •chromite • Edomite • sodomite •stalagmite • Elamite • dolomite •Adullamite • dynamite • catamite •Benthamite •termite, thermite •Samnite • sennight • midnight •lignite • selenite • gelignite •kaolinite • Leninite •finite, transfinite •watchnight • fortnight • Sunnite •exurbanite, suburbanite, urbanite •manganite • ammonite • Mennonite •Canaanite • Maronite • bentonite •Irvingite • respite • alexandrite •Arkwright • cartwright • nephrite •playwright • wainwright •wheelwright • millwright •shipwright • copyright • Nazirite •pyrite • eyebright • nitrite • contrite •chlorite • forthright • downright •Fulbright • upright • meteorite •diorite • fluorite •Labourite (US Laborite) • sybarite •Thatcherite • phosphorite • azurite •anchorite • Hitlerite • dolerite •Amorite • Minorite • laterite •Hutterite • birthright

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"dolerite." Oxford Dictionary of Rhymes. . Encyclopedia.com. 18 Dec. 2017 <http://www.encyclopedia.com>.

"dolerite." Oxford Dictionary of Rhymes. . Encyclopedia.com. (December 18, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/dolerite

"dolerite." Oxford Dictionary of Rhymes. . Retrieved December 18, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/dolerite