* Oceanic Crust: This is the thinner, denser type of crust that makes up the ocean floor. It's about 3-6 miles thick, compared to the thicker continental crust.
* Basalt: This is the dominant rock type in oceanic crust. It's formed from cooled magma that erupted from mid-ocean ridges.
* Other Minerals: While basalt is the primary component, oceanic crust also contains smaller amounts of other minerals like olivine, pyroxene, and plagioclase feldspar.
Important Points:
* Formation: Oceanic crust is constantly being created at mid-ocean ridges where magma rises from the Earth's mantle and cools.
* Subduction: Older oceanic crust is constantly being recycled back into the mantle through a process called subduction.
* Differences from Continental Crust: Continental crust is thicker and less dense than oceanic crust, and it's mainly composed of granite and other granitic rocks.
Let me know if you have any more questions about the Earth's crust!
