Because they are the product of eutectic melting and density separation of the melts.
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).
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.
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.
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.
Examples of igneous rocks are pumice, obsidian, basalt, and rhyolite.
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.
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 crust.
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.
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.
Basalt
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.
Examples of igneous rocks are pumice, obsidian, basalt, and rhyolite.
oceanic crust is made of basalt while continental crust is made of silica rich rocks like granite.
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.
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.
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.