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What happens along a divergent boundary between two oceanic plates?
At a divergent boundary between two oceanic plates, the two plates move apart from each other. This movement creates a gap that allows magma from the mantle to rise up and solidify, forming new oceanic crust. Over time, this process can lead to the formation of mid-ocean ridges.
What are the characteristics of the oceanic crust?
Oceanic crust is thinner and denser than continental crust, primarily composed of basaltic rock. It is typically younger due to the process of seafloor spreading, where new crust is formed at mid-ocean ridges and pushes older crust away. Oceanic crust is also more mafic in composition compared to continental crust.
Which forms at mid-ocean ridges?
New oceanic crust is created along mid ocean ridges. These are areas of the earth where there is divergence or splitting of the ocean floor and basaltic magma oozes out from within the mantle to occupy the gaps and form new crusts.
Tectonic process that takes place along mid-ocean ridges?
It is a constructive activity that takes place at the mid-ocean ridge. The mid-ocean ridge is an area where new crusts are created due to the spliting apart of lithospheric plates. This process is often known as sea-floor spreading and it occurs at divergent boundaries of oceanic lithospheric plates. Here the old plates spreads apart moving away at opposite direction from one another, as they move they give space for new plates or crust to be created by refilling the gaps with magmatic materials that rises from within the asthenospheric layer of the mantle. As this molten uptrust reaches water they cool and solidify and become a new ocean-floor, these re- born oceanic lithosphere are relatively denser than the older ones.
2 types of crust involved at constructive plate margins?
Two types of crust involved at constructive plate margins are oceanic and continental crust. Oceanic crust is formed when magma rises to the surface at mid-ocean ridges, creating new oceanic crust. Continental crust can also be involved at constructive plate margins when rifting occurs, leading to the formation of new continental crust.
What are two kinds of crusts?
oceanic and the continental crust
What the lithosphere made up of?
The lithosphere is composed of the oceanic and continental crusts.
What are the characteristic of the oceanic crust?
The rocks that makes up the oceanic crusts, are very dark, relatively thin and highly dense.
Where are the newest oceanic crusts located?
Near ocean ridges such as the Atlantic ridge
What happens when a plate Carrying oceanic crust collides with a plate carrying continental crusts?
The contiental cdrust is forced under the continental crust in a process called subduction.
What geologic processes that will occur because of the movement of two oceanic crust?
When two oceanic crusts move toward each other, they can create a subduction zone where one plate is forced beneath the other, leading to the formation of oceanic trenches and volcanic arcs. This movement can also result in earthquakes due to the friction and stress at the plate boundaries. Over time, the subducted plate can melt and contribute to magma formation, potentially leading to volcanic eruptions. Additionally, this process can alter the seafloor topography and influence marine ecosystems.
Both the oceanic and continental crusts are partially composed of what material?
Both oceanic and continental crusts consist primarily of igneous rock although they both contain some sedimentary rock. Oceanic crust is composed mainly of basaltic rock, while continental crust is composed of granitic rock.
