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Diabase - Wikipedia, the free encyclopedia
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Quartz-dolerite - Wikipedia, the free encyclopedia
An intrusive rock, similar to dolerite, but with an excess of quartz. Dolerite is similar in composition to basalt, which is eruptive (from volcanoes), and gabbro, which is plutonic. The differing cry...
en.wikipedia.org/wiki/Quartz-dolerite |
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DOLERITE (from Gr. boXepos, deceptive), in petrology, the name given by Haiiy to those basaltic rocks which are comparatively coarse grained and nearly, if not quite, holocrystalline. The commonest type of structure in dolerite is the ophitic, which results from the felspar of the rock having crystallized before the...
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dolerite - Scientific definition of dolerite from A Dictionary of Earth Sciences at Encyclopedia.com ... 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,
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Definition of dolerite from Webster's New World College Dictionary. Meaning of dolerite. Pronunciation of dolerite. Definition of the word dolerite. Origin of the word dolerite. ... Dictionary Home » Webster's New World College Dictionary » dolerite...
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dolerite n. Chiefly British A dark, fine-grained igneous rock; diabase. [French dolérite , from Greek doleros , deceitful (from its easily being ... As defined, diabase is equivalent to the British term dolerite. The British term diabase is an altered diabase in the sense defined here. See alsoBasalt; Gabbro; Igneous rocks...
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Definition of Dolerite with photos and pictures, translations, sample usage, and additional links for more information. ... Definition of Dolerite...
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rockalso called Dolerite, ... fine- to medium-grained, dark gray to black intrusive igneous rock. It is extremely hard and tough and is commonly quarried for crushed stone, under the name of trap. Although not popular, it makes an excellent monumental stone and is one of the dark-coloured rocks commercially known as...
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Dolerite is a medium-grained, mafic, intrusive, igneous rock with a chemical composition similar to that of basalt and gabbro. The rock usually forms as dykes and sills in basaltic provinces. It may also occur as dyke or sill swarms.
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The Geology of Northern Ireland - Dolerite ... Dolerite is a volcanic rock. While similar to basalt, it contains crystals which can be seen with a hand lens. This indicates that it cooled a little more slowly than basalt. Typically it is found in volcanic plugs which channeled the basalt to the surface.
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