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When the ocean floor collides with a crustal plate what happens?
it subducts underneath the crustal plate
Why the crust is thinner than the ocean floor?
The Earth's crust is thinner than the ocean floor because the oceanic crust is formed at mid-ocean ridges where heat from the mantle creates new crust through volcanic activity. This process creates younger, hotter, and thinner crust in the ocean compared to the older and thicker continental crust.
What is continental margin?
The continental margin is the zone of the ocean floor that separates the thin oceanic crust from thick continental crust.
What is a gradually sloping portion of the ocean floor that is made of the continental crust?
Continental shelf.
What is a gradually Sloping portion of the ocean floor that is made of continental crust?
Continental shelf.
Why are the oldest parts of the ocean floor no older than about 200 million years.?
Because the oldest parts reach the continental crust and then the ocean floor sinks beneath the continental crust, into the mantle.
What does the continental margin consist of?
The continental margin is the zone of ocean floor that separates oceanic crust and continental crust. It accounts for 28% of all oceanic area.
What crust makes up the ocean floor?
The ocean floor is mainly composed of basaltic crust known as oceanic crust. This crust is thinner and denser than continental crust and is formed through volcanic activity at mid-ocean ridges.
Is the earth's crust includes both ocean floor and dry land?
Yes, the Earth's crust includes both the ocean floor and dry land. The crust is the outermost layer of the Earth, composed of continental crust (which forms the continents) and oceanic crust (which forms the ocean floor). While the continental crust is generally thicker and less dense, the oceanic crust is thinner and denser. Together, they make up the Earth's lithosphere.
What is a continental margin?
A continental margin is the zone of transition between a continent and the deep ocean floor. It includes the continental shelf, continental slope, and continental rise. It is an area where sediments from the continent are deposited and tectonic activity can occur.
The relatively steep transition between the continental shelf and the ocean basin is the continental slope?
Yes, the continental slope is the relatively steep slope that connects the continental shelf to the deep ocean floor. It marks the boundary between the continental crust and oceanic crust.
What is the portion of the ocean floor that is made up of oceanic crust?
Approximately 60% of the ocean floor is made up of oceanic crust. Oceanic crust is typically thinner and denser than continental crust, and it forms at mid-ocean ridges through volcanic activity.
