Definitions
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- noun Plural form of
feldspar .
Etymologies
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Examples
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It was at this epoch that the rocks called feldspars, syenites, and porphyries appeared.
Voyage au centre de la terre. English Jules Verne 1866
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It is home to glasses, pyroxenes, feldspars, oxides, olivines, troilite and metals in its lunar soil, which is called regolith.
Weekend SkyWatcher's Forecast: March 19-21, 2010 | Universe Today 2010
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Many common minerals, including feldspars, contain aluminum, but extracting the metal from most minerals is very energy-intensive, and therefore expensive.
Aluminum 2008
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Of course plagioclase feldspars are also one of my favorites so I might be a little partial here.
Archive 2008-09-01 ReBecca Foster 2008
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Of course plagioclase feldspars are also one of my favorites so I might be a little partial here.
5 Minerals ReBecca Foster 2008
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The minerals included in this group are orthoclase, microcline, and the plagioclase feldspars.
Feldspar 2008
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All of these rock types are light in color because of the dominance of quartz, potassium and sodium feldspars, and plagioclase feldspar minerals (Figure 1).
Igneous rock 2007
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GABBRO: A black,course-grained,intrusive igneous rock,composed of calcic feldspars and pryoxene.
Think Progress » Molly Ivins hospitalized in cancer battle. 2007
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GABBRO: A black,course-grained,intrusive igneous rock,composed of calcic feldspars and pryoxene.
Think Progress » Molly Ivins hospitalized in cancer battle. 2007
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In this rock, you get the recrystallization and foliation of quartz, feldspars, micas, and amphiboles into alternating light - and dark-colored bands.
Metamorphic rock 2007
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