Here's why:
* Mid-ocean ridges: These underwater mountain ranges are where new ocean floor is created through a process called seafloor spreading. Magma rises from the Earth's mantle, cools and solidifies, forming basalt.
* Volcanic activity: Volcanoes on the ocean floor, both active and extinct, also contribute to the abundance of basalt.
While basalt is the dominant rock type, other rocks are found in smaller amounts:
* Sedimentary rocks: These form from the accumulation of sediments like sand, mud, and the remains of marine organisms.
* Ultramafic rocks: These rocks are found in deeper parts of the ocean and are richer in magnesium and iron than basalt.
So, while the ocean floor is a diverse environment, basalt is the key player in its formation and geology.
