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Igneous Rock Types: Basalt, Granite and More ... The two best-known igneous rock types are basalt and granite, which differ in composition. Basalt is the dark, fine-grained stuff of many lava flows and magma intrusions. Its dark minerals are rich in magnesium (Mg) and iron (Fe), hence basalt is called a mafic rock.
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geology.about.com/cs/basics_roxmin/a/aa011804a.htm
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Basalt is an extrusive igneous rock. It is the bedrock of the ocean floor and also occurs on land in extensive lava flows. ... Basalt: a fine-grained igneous rock that is usually black in color. The specimen shown is about two inches (five centimeters) across.
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geology.com/rocks/basalt.shtml
geology.com/rocks/basalt.shtml
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A photo gallery of intrusive and extrusive rocks by Geology.com ... Basalt is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene. The specimen shown 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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Eventually it cools enough to solidify completely and form an igneous rock, such as the granite and basalt below. Granite and basalt are the two most abundant igneous rocks at the earth's surface.
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csmres.jmu.edu/geollab/Fichter/IgnRx/Introigrx.html
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Basalt - Wikipedia, the free encyclopedia
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Basalt (pronounced /bəˈsɔːlt, ˈbeisɔːlt, ˈbæsɔːlt/ ) is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. I...
en.wikipedia.org/wiki/Basalt
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List the different igneous rock textures (aphanitic, phaneritic, porphyritic, pegmatitic, vesicular, glass, and pyroclastic) and explain ... Bowen's Reaction Series helps us to understand why certain minerals tend to occur together in igneous rocks. For example, the mafic rocks, basalt and gabbro tend to contain olivine,
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facstaff.gpc.edu/~pgore/geology/physical_lecture/igneou...
facstaff.gpc.edu/~pgore/geology/physical_lecture/igneous.html
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Igneous Rock Identification; Nature's Fiery Cauldron ... Igneous Rock Textures ... basalt picture...
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geology.csupomona.edu/alert/igneous/ignrxs.htm
geology.csupomona.edu/alert/igneous/ignrxs.htm
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This term refers to vesicles (holes, pores, or cavities) within the igneous rock. Vesicles are the result of gas expansion (bubbles), which often occurs during volcanic eruptions. Pumice and scoria are common types of vesicular rocks. ... The image to the left shows a basalt with vesicles, hence the name "vesicular basalt"
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geology.csupomona.edu/alert/igneous/texture.htm
geology.csupomona.edu/alert/igneous/texture.htm
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GRANITE: An igneous-plutonic rock, medium to coarse-grained that is high in silica, potassium, sodium and quartz but low in calcium, ... BASALT: An igneous volcanic rock, dark gray to black, it is the volcanic equivalent of plutonic gabbro and is rich in ferromagnesian minerals. Basalt can be used in aggregate.
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www.coaleducation.org/lessons/wim/20.htm
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