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A photo gallery of intrusive and extrusive rocks by Geology.com ... Gabbro is a coarse-grained, dark colored, intrusive igneous rock that contains feldspar, augite and sometimes olivine. The specimen shown above is about two inches (five centimeters) across.
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geology.com/rocks/igneous-rocks.shtml
geology.com/rocks/igneous-rocks.shtml
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Pictures and descriptions of rocks on About.com Geology ... Anorthosite—A rare plutonic feldspar-only rock. Basalt—A bubbly, crystally chunk of this igneous rock from Kilauea. Diorite—A plutonic rock between granite and gabbro. Dunite—A plutonic rock made of straight olivine.
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geology.about.com/library/bl/images/blrockindex.htm
geology.about.com/library/bl/images/blrockindex.htm
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Gabbro is one of the major igneous rock types. ... Gabbro is named after a town in Tuscany, Italy. You can get away with calling almost any dark, coarse-grained igneous rock gabbro.
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geology.about.com/od/rocks/ig/igrockindex/rocpicgabbro....
geology.about.com/od/rocks/ig/igrockindex/rocpicgabbro.htm
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Likewise, basalt (a mafic extrusive rock) has the same mineral composition of the mafic intrusive rock, gabbro. This generalized composition of felsic and mafic can be subdivided into intermediate (between felsic and mafic composition), and ultramafic (rocks extremely enriched ... Gabbro -- intrusive igneous rock...
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vulcan.wr.usgs.gov/LivingWith/VolcanicPast/Notes/igneou...
vulcan.wr.usgs.gov/LivingWith/VolcanicPast/Notes/igneous_rocks.html
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Gabbro is normally found in the lower parts of oceanic crust and sometimes in relatively small intrusive features in continental crust. ... Andesite is a common fine grained extrusive igneous rock that forms from lavas erupted by volcanoes located along continental margins. Coarse grained diorite is found in intrusive...
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www.physicalgeography.net/fundamentals/10e.html
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Igneous rock - Wikipedia, the free encyclopedia
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Igneous rock (from the Latin ignis meaning fire ) is one of the three main rock types (the others being sedimentary and metamorphic rock). Igneous rock is formed by magma (molten rock) being cool...
en.wikipedia.org/wiki/Igneous_rock
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This is an interesting specimen because gas bubbles formed in the rock have been filled with quartzite.
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www.randall.k12.wi.us/rocks/gabbro.htm
www.randall.k12.wi.us/rocks/gabbro.htm
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; Gabbro : Carrock Fell, Lake District ... This is a dark, medium to coarse-grained intrusive rock. The dark minerals are mainly pyroxene (over 50%) with minor amounts of hornblende or biotite. The light minerals are usually light grey plagioclase feldspars.
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www.kabrna.com/cpgs/rocks/igneous/gabbro.htm
www.kabrna.com/cpgs/rocks/igneous/gabbro.htm
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gabblo igneous rock foun ... Your Ad Here ... igneous rock; 10(e) Characteristics of Igneous Rocks; Igneous Rocks; Introduction to Igneous Rocks;
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www.sciencelobby.com/spellcheck/g/gabbro_igneous_rock_f...
www.sciencelobby.com/spellcheck/g/gabbro_igneous_rock_found.html
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