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The rock that makes up oceanic crust is primarily basalt. Basalt is a fine-grained, dark volcanic rock that forms from the cooling and solidification of molten lava at or near the Earth's surface.
The solid rock layer of the Earth is known as the crust, which is the outermost layer of the planet. The crust is divided into two types: continental crust, which makes up the continents, and oceanic crust, which makes up the ocean floors. The thickness of the crust can vary, with continental crust being thicker than oceanic crust.
Basalt is the most common rock that makes up oceanic crust. It is formed from solidified lava from volcanic eruptions along mid-ocean ridges.
The light colored rock that makes up most of the continental crust is granite. It is a coarse-grained igneous rock composed mainly of quartz and feldspar minerals. Granite is less dense than the dark basaltic rock that makes up oceanic crust.
The light-colored rock that makes up the continental crust is called granite. Granite is a coarse-grained igneous rock composed mainly of quartz, feldspar, and mica. It is less dense and more buoyant than the darker basaltic rock that makes up the 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.