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Because they are the product of eutectic melting and density separation of the melts.

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What layer of the Earth is made up of the rocks basalt and granite?

The Earth's outermost layer where basalt and granite are found is called the crust. Basalt is more common in the oceanic crust, while granite is more prevalent in the continental crust.


What layer of the earth contains granite and basalt in the GREATEST abundance?

The crust is the layer of the Earth that contains granite and basalt in the greatest abundance. These rocks are commonly found in the continental crust (granite) and oceanic crust (basalt).


The layer of Earth made up largely of the rocks basalt and granite is the?

The crust.


Are basaltic igneous rocks lower in density than granitic rocks?

Granite is very much less dense than basalt. This is why the continental crust (mostly composed of granite) floats on Oceanic crust (made mostly of basalt). Granite is 70 % silicon. Where basalt is mainly pyroxene.


What kind of rocks make up continental crust and oceanic crust?

Continental crust is mainly composed of granitic rocks such as granite and rhyolite, which are light in color and less dense. Oceanic crust is primarily composed of basaltic rocks, specifically basalt, which are dark in color and more dense than granitic rocks.


What is the most common extrusive igneous rock?

Basalt


What kind of rocks make up the most of the igneous rocks?

Basalt and granite are the most common types of rocks that make up igneous rocks. Basalt is a fine-grained volcanic rock, while granite is a coarse-grained intrusive rock.


Name 4 kinds of igneous rocks?

Examples of igneous rocks are pumice, obsidian, basalt, and rhyolite.


What composition is earths crust?

oceanic crust is made of basalt while continental crust is made of silica rich rocks like granite.


What kinds of rocks form most of the crust of the earth?

The majority of Earth's crust is composed of igneous rocks, particularly basalt and granite. These rocks form through the cooling and solidification of molten material from beneath the Earth's surface.


What 2 types of rock are most common beneath the earths crust?

The two most common types of rock beneath the Earth's crust are basalt and granite. Basalt is an extrusive igneous rock that forms from the cooling of magma on the Earth's surface, while granite is an intrusive igneous rock that forms from the slow cooling of magma beneath the Earth's surface.


What type of rock makes up the continental and oceanic crust?

The continental crust is mainly composed of igneous rocks like granite and metamorphic rocks like gneiss. The oceanic crust is primarily made of basalt, which is an igneous rock that forms from cooling lava at mid-ocean ridges.