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Which rock type is the most abundant on the ocean floor?
Quick Answer
Basalt is the most common rock type on the ocean floor, forming most of the oceanic crust.
The Full Story
Basalt is the dominant rock of Earth’s ocean floor because it is the main rock formed by lava at mid-ocean ridges. As tectonic plates spread apart, molten material rises from the mantle and cools quickly into fine-grained basalt. This creates oceanic crust that is much thinner and denser than continental crust. Over time, older basaltic crust can be recycled back into the mantle at subduction zones.
Key Facts
1.Basalt forms most oceanic crust
2.Created mainly at mid-ocean ridges
3.Oceanic crust is denser and thinner than continental crust
YouTube Angle
Suggested video title for this topic:
"The ocean floor is built from this dark volcanic rock—here’s why."
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