What features of seafloor mountain ranges on the ocean floor Upwells magma and formed new ocean floor?
The location on the seafloor where magma upwells and new seafloor forms. Mid-ocean ridges are the dominant feature of divergent plate boundaries found in the oceans. The mechanism for moving continents. The formation of new seafloor at spreading ridges pushes lithospheric plates on the Earth’s surface.
What is the ocean floor made up of?
Ocean rocks and sediments
Ocean crust is denser, thinner, darker-colored, and contains more of the chemical elements iron and magnesium than continental crust. The basement of the ocean basins is mostly made of black, volcanic rock called basalt. Mid-oceanic ridge volcanoes produce basalt.
Which of the following features of the ocean indicate tectonic activity?
Deep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault lines are examples of features that can form along plate tectonic boundaries. … Usually, one of the converging plates will move beneath the other, a process known as subduction.
What ocean floor features are part of the continental crust?
A continental margin is the outer edge of continental crust abutting oceanic crust under coastal waters. It is one of the three major zones of the ocean floor, the other two being deep-ocean basins and mid-ocean ridges. The continental shelf is the relatively shallow water area found in proximity to continents.
Where is the ocean floor deepest?
Mariana Trench
The Mariana Trench, in the Pacific Ocean, is the deepest location on Earth. According to the Exclusive Economic Zone (EEZ), the United States has jurisdiction over the trench and its resources.
How is the deep ocean floor different from the shallow parts of the ocean floor near land?
How is the deep ocean floor different from the shallow parts of the ocean floor near land? The deep ocean floor is flatter than the parts of the ocean floor than parts of the ocean floor near the land. the deep ocean floor is steeper than the parts of the ocean floor near the land.
What is the meaning of ocean floor?
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.
What is seafloor spreading quizlet?
In sea-floor spreading, the sea floor spreads apart along both sides of a mid-ocean ridge as new crust is added. As a result, the ocean floors move like conveyor belts, carrying the continents along with them.
What happens to the ocean floor at deep ocean trenches?
In ocean trenches one tectonic plate sinks underneath another, called a subduction zone at convergent boundaries. … As the oceanic plate sinks, it melts into the mantle and the magma is recycled into the Earth.
What is the process where the ocean floor sinks below the deep ocean trench and back into the mantle?
Subduction is the process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle.
What happens at the bottom of the ocean?
Where is the bottom of the sea?
In the Pacific Ocean, somewhere between Guam and the Philippines, lies the Marianas Trench, also known as the Mariana Trench. At 35,814 feet below sea level, its bottom is called the Challenger Deep — the deepest point known on Earth.
What can we find at the bottom of the ocean?
In addition to minerals, we’ve found unusual animals at the bottom of the ocean. Smithsonian points out that even at 13,000 feet below the surface, where temperatures are near freezing and there’s no sunlight, researchers have discovered living creatures such as fish, coral, crustaceans, jellyfish and worms.
What are three kinds of evidence of the ocean floor spreading?
Several types of evidence from the oceans supported Hess’s theory of sea-floor spreading-evidence from molten material, magnetic stripes, and drilling samples.
Seafloor Spreading
Ocean Floor Features
Ocean Floor Features
Sea Floor Spreading Lecture
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