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Why is continental crust deeper than oceanic crust?
The oceans flow to the places where the crust is the lowest. Gravity causes them to flow downward. The mantle, below the crust, is at the same depth everywhere, so if the crust is lower, it is because it is thinner.
How much older are the oceanic rocks than the continental rocks?
Continental rocks are older than oceanic rocks. The continents have been continously growing over millions of years and adding the oceanic sediment to their margins over time.
What happens when the contential crust collides with the same crust?
When continental crust collides with the same crust it creates an earthquake, or sometime it can cause a volcano to explode. Including oceanic crust.
How do volcano's form when oceanic and continental plates collide?
Mountains form where continental and oceanic plates collide by the actions of the plates upon one another. Often one plate pushes up and over the other one, and the upper one creates a row of mountains.
What are the differences between oceanic crust and continental crust in age terms?
Overall their materials are of the same age, but the continental plates simply break or collide whereas the ocean-floor plates are in constant cycles of construction and destruction.
Is heat flow the same between the continental and oceanic crust?
Apparently No, heat flow in oceanic crust is higher than continental crust
Why is continental crust deeper than oceanic crust?
The oceans flow to the places where the crust is the lowest. Gravity causes them to flow downward. The mantle, below the crust, is at the same depth everywhere, so if the crust is lower, it is because it is thinner.
Do lithospheric plates include both continental crust and oceanic crust?
It is possible to have continental and oceanic crust on the same plate. The only to this exception is with the Pacific plate which exists independently.
How much older are the oceanic rocks than the continental rocks?
Continental rocks are older than oceanic rocks. The continents have been continously growing over millions of years and adding the oceanic sediment to their margins over time.
How do continental crust differ from oceanic?
Continental crust is predominantly composed mostly of rock of a granitic composition, higher in silica and aluminum, with layers of sedimentary rock above. Oceanic crust is predominantly basaltic (higher in iron and magnesium), darker, thinner, more dense, and formed from rapid cooling of lava.
How are continental crust and oceanic crust are alike?
Oceanic and continental crust contain the same elements. Both also move and shift and grow continuously. They are different because of their density.
Which direction does heat flow from when both temperatures are the same?
When both temperatures are the same, heat does NOT flow between objects.
Why is oceanic plate denser than continental plate?
Oceanic plates are primarily made up of basaltic rock while continental plates are primarily made of granitic rock. Basalt is denser than granite which allows oceanic plates to subduct beneath continental plates.
How are the continental crust and the oceanic crust the same?
Both are made of brittle hard rock that is mostly silicate in nature.
Is the fraction of the south American plate occupied by oceanic crust increasing or decreasing?
It is increasing. The total amount of continental crust remains the same, but new oceanic crust is being formed at the Mid Atlantic Ridge.
Why would a certain thickness of continental crust displace less of the mantle than the same thickness of oceanic crust?
Because its less dense
What happens when the contential crust collides with the same crust?
When continental crust collides with the same crust it creates an earthquake, or sometime it can cause a volcano to explode. Including oceanic crust.
