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Posted on April 16, 2022 (Updated on July 9, 2025)

What is the oceanic floor made of?

Regional Specifics

The ocean floor itself is made of mafic rocks, the crystallized matter from silicate magma. … Minerals found under the seabed include gabbro, basalt, serpentine, peridotite, olivine and ore minerals from VMS.

What type of rock is the ocean floor made of?

basalt

Ocean rocks and sediments
The basement of the ocean basins is mostly made of black, volcanic rock called basalt. Mid-oceanic ridge volcanoes produce basalt. The centers of the continents are composed mainly of coarse-grained, light-colored rocks like granite.

Is the ocean floor made of basalt?

As it turns out, most of the ocean floor is basalt, and most of the continents are granite.

What’s under the ocean floor?

The ocean floor is called the abyssal plain. Below the ocean floor, there are a few small deeper areas called ocean trenches. Features rising up from the ocean floor include seamounts, volcanic islands and the mid-oceanic ridges and rises.

What are 4 types of ocean floor?

They are;

  • Continental Shelf.
  • Continental slope.
  • Abyssal plains.
  • The ocean deeps/ submarine trenches.

What is sea flooring?

Definition of seafloor

: the floor of a sea or ocean : seabed The Earth’s crust, in this view, is divided into several immense plates that make up the continents and seafloors, and that all float on a hot, plastic, subterranean “mantle.”— Walter Sullivan.

How was the ocean floor formed?

As plates converge, one plate may move under the other causing earthquakes, forming volcanoes, or creating deep ocean trenches. Where plates diverge from each other, molten magma flows upward between the plates, forming mid-ocean ridges, underwater volcanoes, hydrothermal vents, and new ocean floor crust.

How do you describe the ocean floor?

The ocean floor covers more than 70 percent of the planet’s surface. Like dry land, the ocean floor has various features including flat plains, sharp mountains, and rugged canyons (Fig. 7.1). However, the lowest point in the world ocean is much deeper than the highest point on land.

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