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An igneous rock that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals has a composition that is?
An igneous rock that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals is classified as a basaltic or mafic rock. This composition typically indicates a formation from a relatively high-temperature magma that is rich in iron and magnesium. The presence of plagioclase feldspar suggests a significant amount of sodium and calcium in the rock's mineral makeup. Overall, this rock type is commonly associated with volcanic activity and can be found in oceanic crust.
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What minerals does the rock granite always contain?
Granite always contains the minerals quartz, feldspar (potassium feldspar or plagioclase feldspar), and mica (biotite or muscovite). These minerals give granite its characteristic appearance and properties.
What minerals form the rocks diorite and andesite?
The minerals that form diorite include plagioclase feldspar, biotite, and hornblende. Andesite is primarily composed of plagioclase feldspar, pyroxene, and hornblende. Both rocks are intermediate in composition between granite and basalt.
What is the dominant feldspar in basalt?
The dominant feldspar in basalt is plagioclase feldspar, specifically the sodium-rich variety known as labradorite. Plagioclase typically makes up a significant portion of basalt's mineral composition, alongside other minerals like pyroxene and olivine. The presence of plagioclase contributes to basalt's overall texture and characteristics.
What four minerals make up rocks in the intermediate family?
The four minerals that make up rocks in the intermediate family are plagioclase feldspar, amphibole (such as hornblende), biotite, and quartz. These minerals are typically found in rocks like diorite and andesite, which have a composition between felsic and mafic rocks.
Rocks that contain dark silicate minerals and plagioclase feldspar have?
Basaltic composition, commonly found in oceanic crust and volcanic islands.
What minerals does the rock granite always contain?
Granite always contains the minerals quartz, feldspar (potassium feldspar or plagioclase feldspar), and mica (biotite or muscovite). These minerals give granite its characteristic appearance and properties.
Which minerals are found in basalt and gabbro?
Basalt contains minerals such as plagioclase feldspar, pyroxene, and olivine. Gabbro also contains plagioclase feldspar and pyroxene, but generally has a coarser texture due to slower cooling rates underground.
What is the mineral composition of syenite?
Syenite is primarily composed of alkali feldspar minerals such as orthoclase and plagioclase feldspar, along with small amounts of other minerals such as quartz, hornblende, and mica. It lacks significant amounts of calcium-rich plagioclase feldspar, which distinguishes it from granite.
What composition refers to rocks with many dark silicate minerals and plagioclase feldspar?
The composition referring to rocks with many dark silicate minerals and plagioclase feldspar is called basalt. Basalt is a fine-grained igneous rock that is commonly found in oceanic crust and volcanic islands.
A certain igneous rock contains about 25 percent dark silicate minerals The remainder of the rock is mostly plagioclase feldspar What type of composition does tthis igneous rock have?
ultramafic
What igneous rocks have a mineral composition between that of granitic and basaltic rocks?
Andesite and diorite are two common igneous rocks that have a mineral composition intermediate between granitic and basaltic rocks. Andesite is fine-grained and contains plagioclase feldspar and pyroxene minerals, while diorite is coarse-grained and composed of plagioclase feldspar, amphibole, and other minerals.
What minerals form the rocks diorite and andesite?
The minerals that form diorite include plagioclase feldspar, biotite, and hornblende. Andesite is primarily composed of plagioclase feldspar, pyroxene, and hornblende. Both rocks are intermediate in composition between granite and basalt.
Which rock has an intermediate composition?
Andesite is a rock with an intermediate composition. It contains minerals such as plagioclase feldspar, amphibole, and pyroxene, giving it a balance between light and dark minerals. Andesite forms from the cooling of magma with a composition between basalt and granite.
What type of composition does an igneous rock have that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals?
The igneous rock with mostly plagioclase feldspar and about 30 percent dark silicate minerals is likely a basalt. Basalt is a fine-grained extrusive rock that is commonly found in oceanic crust and volcanic islands. The dark silicate minerals in basalt are typically pyroxene and olivine.
What four minerals make up rocks in the intermediate family?
The four minerals that make up rocks in the intermediate family are plagioclase feldspar, amphibole (such as hornblende), biotite, and quartz. These minerals are typically found in rocks like diorite and andesite, which have a composition between felsic and mafic rocks.
Rocks that contain dark silicate minerals and plagioclase feldspar have?
Basaltic composition, commonly found in oceanic crust and volcanic islands.
What minerals are in granite but not gabbro?
Granite contains Quartz and Plagioclase Feldspar and Gabbro does not have neither if these minerals in it.
