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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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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "dolerite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "dolerite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O13-dolerite.html AILSA ALLABY and MICHAEL ALLABY. "dolerite." A Dictionary of Earth Sciences. 1999. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-dolerite.html |
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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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T. F. HOAD. "dolerite." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. T. F. HOAD. "dolerite." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O27-dolerite.html T. F. HOAD. "dolerite." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-dolerite.html |
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diabase
diabase see basalt . |
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Cite this article
"diabase." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "diabase." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-X-diabase.html "diabase." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-X-diabase.html |
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diabase
diabase See DOLERITE.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "diabase." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "diabase." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O13-diabase.html AILSA ALLABY and MICHAEL ALLABY. "diabase." A Dictionary of Earth Sciences. 1999. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-diabase.html |
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dolerite
dolerite
•Hamite, 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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Cite this article
"dolerite." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "dolerite." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O233-dolerite.html "dolerite." Oxford Dictionary of Rhymes. 2007. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-dolerite.html |
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