gabbro

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gab·bro

 (găb′rō)
n. pl. gab·bros
A usually coarse-grained igneous rock composed chiefly of pyroxene and calcic plagioclase feldspar. Also called norite.

[Italian, perhaps from Latin glaber, bald, beardless.]

gab·bro′ic (gă-brō′ĭk), gab′broid′ (găb′roid′) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

gabbro

(ˈɡæbrəʊ)
n, pl -bros
(Minerals) a dark coarse-grained basic plutonic igneous rock consisting of plagioclase feldspar, pyroxene, and often olivine
[C19: from Italian, probably from Latin glaber smooth, bald]
gabˈbroic, ˌgabbroˈitic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

gab•bro

(ˈgæb roʊ)

n., pl. -bros.
a dark granular igneous rock composed essentially of labradorite and augite.
[1835–40;< Italian; akin to Latin glaber smooth]
gab•bro•ic (gəˈbroʊ ɪk) gab`bro•it′ic, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

gab·bro

(găb′rō)
A usually dark, coarse-grained igneous rock composed mostly of plagioclase and pyroxene. It is mineralogically similar to basalt but has larger crystals. See Table at rock.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

gabbro

A dense, dark, coarse-grained, intrusive igneous rock that largely consists of feldspar and pyroxene.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.gabbro - one of a family of granular intrusive rocks
igneous rock - rock formed by the solidification of molten magma
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
References in periodicals archive ?
By comparison, the currently producing Lac des Iles Complex in Ontario is approximately the same size (18 km long x 5 km wide) as the Love Lake Complex, with mine production derived from a much smaller, predominantly gabbroic body 3 km by 1 km in size.
The company explains that "Although the assay results show lower than expected values from the altered Karoo sediments in both holes, the gabbroic rocks appear to be more mineralized with anomalous values of gold and base metal occurring towards the bottom of hole DitDDH2 (478m to 557m)."
This result corresponds well to observations from the Skaergaard complex in Greenland [62], the Isle of Skye [63], and the Geitafell Volcano in Iceland [64], where quartz is abundant at distances of >0.2 km from the intrusive contact while the inner core of the gabbroic intrusion is relatively lacking in quartz.
According to the petrographie description the rock texture is fine-grained, massive, medium-inequigranular and gabbroic.
Gabbroic rocks, exposed a short distance down river to the south, are injected by red granitic dykelets characteristic of the Utopia Granite; the granitic dykelets surround clusters of lobate gabbroic enclaves, many of which have fine-grained margins, suggesting that emplacement of the two magma types was essentially contemporaneous (Fig.
Tivey: The Moho has been defined as a seismological boundary: Seismic waves travel faster through the mantle below the Moho because it is made of peridotite, a denser rock than the gabbroic rock above the Moho.
Nickel deposits in the country are predominantly associated with laterite ores (limonite being a member of the laterite family), but are also found in dunite, pyroxenite and gabbroic rocks as stated by the Philippines' Mines and Geosciences Bureau.
Globally, the Middle Atlas structure corresponds, on one hand, to large synclinal basins with axes that are parallel to the chain and, on the other hand, to narrow anticlinal ridges, sometimes, intruded with gabbroic rocks (Fedan, 1988).