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Which mineral can be found in all samples of rhyolite and andesiteh igneous rock is dark colored cooled rapidly on Earth's surface and is composed mainly of plagioclase feldspar olivine and pyroxene?
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Which igneous rock is dark colored cooled rapidly on earths surface and is composed mainly of plagioclase feldspar olivine and pyroxene?
scoria
What four minerals make up rocks in the intermediate family?
Plagioclase feldspar, hornblende, pyroxene, biotite mica
What are the ten most rock- forming minerals?
Quartz, Potassium Feldspar, Plagioclase Feldspar, Muscovite (mica), Biotite (mica), Amphibole (hornblende), Pyroxene, Olivine, Calcite, Dolomite.
Can gabbro contain mineral quartz?
No, gabbro does not typically contain mineral quartz. Gabbro is a coarse-grained igneous rock composed primarily of calcium-rich plagioclase feldspar and pyroxene minerals. Quartz is not a common mineral in gabbro; it is more common in granitic rocks.
What mineral composition is most characteristic of mafic rocks?
olivine, pyroxene, and calcium-rich plagioclase
What is a coarse-grained rock composed of intermediate plagioclase feldspar and pyroxene?
Diorite
What is the mineral of andesite?
plagioclase feldspar, pyroxene, horneblende (amphibole)
Which igneous rock is dark colored cooled rapidly on earths surface and is composed mainly of plagioclase feldspar olivine and pyroxene?
scoria
Which is a coarse-grained igneous rock composed of mainly pyroxene plagioclase feldspar and olivine?
Gabbro.
Which intrusive igneous rock could be composed of 60 percent pyroxene 25 percent plagioclase feldspar 10 percent olivine and 5 percent amphibole?
gabbro
What are the four kinds of igneous rock?
Igneous rocks are usually classified first by their color index. The color index is separated into four categories. Felsic rocks are the lightest and are composed of mostly quartz and potassium feldspar. Intermediate rocks are the second lightest and are made up of mostly plagioclase feldspar, pyroxene, amphibole, and biotite. Mafic rocks are made up of plagioclase feldspar, pyroxene, and amphibole. Ultramafic is made up of mostly olivine, with pyroxene and amphibole.
How does metamorphism affect baslt?
Basalt when metamorphosed turns to the following rocks: (LEAST PRESSURE AND TEMPERATURE TO THE MOST) + mineralogy -Greenschist-albite, epidote, chlorite -Amphibolite-amphioble, plagioclase feldspar -Granulite-calcium-rich pyroxene and plagioclase feldspar -Eclogite-sodium-rich pyroxene and garnet
What four minerals make up rocks in the intermediate family?
Plagioclase feldspar, hornblende, pyroxene, biotite mica
What describes an andesite?
Andesite are fine-grainedextrusive, igneous volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, such as hornblende, pyroxene or biotite.(Refer to Geology.com -Igneous Rocks)
What are the ten most rock- forming minerals?
Quartz, Potassium Feldspar, Plagioclase Feldspar, Muscovite (mica), Biotite (mica), Amphibole (hornblende), Pyroxene, Olivine, Calcite, Dolomite.
What is the chemical composition of a basalt?
The mineralogy of basalt is characterized by a preponderance of calcic plagioclase feldspar and pyroxene. Olivine can also be a significant constituent.
What is diorite?
Diorite is an intrusive igneous rock mostly composed of plagioclase feldspar, biotite mica, hornblende, and/or pyroxene. It mostly appears as gray in color, or whitish with black specs--a salt and pepper look. It may contain small amounts of quartz.
