Diabase (/ ˈ d aɪ. ə b eɪ s /) or dolerite or microgabbro is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine grained to aphanitic chilled margins which may contain tachylite (dark mafic glass).
Quartz-dolerite contains many cooling fractures and weathers badly, becoming unstable. It is not uncommon for large boulders to break loose, and significant rockfalls are not uncommon. It is regarded as dangerous as far as climbing is concerned. This article related to petrology is a stub.
(geology) A fine-grained basaltic rock ... Definition from Wiktionary, the free dictionary
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. As may be inferred from their highly crystalline state they are very often intrusive, and occur as dikes and sills, but many of them form lava flows.
Define dolerite. dolerite synonyms, dolerite pronunciation, dolerite translation, English dictionary definition of dolerite. n. Chiefly British A dark, fine-grained igneous rock; diabase. dol′er·it′ic adj. n 1. a dark basic intrusive igneous rock consisting of plagioclase feldspar...
Dolerite was brought from Arabia, cedar from Syria, gold and precious stones from the east. The World's Progress, Vol. I (of X) | Various. These are caused either by old intrusions of diabase and gabbro which have undergone modifications, or by later ones of dolerite.
Dolerite definition is - any of various coarse basalts. History and Etymology for dolerite. French dolérite, from Greek doleros deceitful, from dolos deceit; from its being easily mistaken for diorite
As a noun dolerite is (geology) a fine-grained basaltic rock. dolomite . English (wikipedia dolomite) Noun (mineral) A saline evaporite consisting of a mixed calcium and magnesium carbonate, with the chemical formula Ca]]Mg(C[[oxygen, O 3) 2; it also exists as the rock dolostone. Synonyms * magnesian limestone Derived terms
What Is Dolerite? A dolerite, also called a diabase, is an igneous rock, which means it was generated from the cooling and solidification of molten Earth material. It is also referred to as a volcanic rock.
Diabase, also 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 black granite.Diabase is widespread and occurs in dikes (tabular bodies ...