Oceanic crust is created at
divergent boundaries
, such as the mid-ocean ridge. Oceanic crust is destroyed at convergent boundaries where subduction results in a trench, such as the Mariana Trench or Cayman Trough.]
At which type of boundary is new oceanic crust created quizlet?
The plates move away from each other. Which of the following statements about
divergent boundaries
is true? New ocean crust is created at a divergent boundary. You just studied 59 terms!
At which type of boundary is new oceanic crust created?
A divergent boundary
occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust.
Where does new oceanic crust form boundary?
A
divergent boundary
occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust. The Mid-Atlantic Ridge is an example of divergent plate boundaries.
At which type of boundary does new crust form?
Divergent boundaries
— where new crust is generated as the plates pull away from each other. Convergent boundaries — where crust is destroyed as one plate dives under another.
Where is new crust formed?
Earth’s newest crust is created at
sites of seafloor spreading
—red sites on this map. Seafloor spreading and rift valleys are common features at “triple junctions.” Triple junctions are the intersection of three divergent plate boundaries.
Which type of boundary neither creates nor destroys crust *?
At divergent plate boundaries, new oceanic crust is formed. At convergent boundaries, old oceanic crust is destroyed. But at
transform plate boundaries
, crust is neither created nor destroyed.
What is oceanic divergent boundary?
Oceanic-Oceanic Plate Divergence is
the divergence of plate boundaries of oceanic plates
. … This forms a mid-oceanic ridge, which is a central ridge structure that divides the ocean basin in half. The newly formed rocks are closest to the mid-oceanic ridge and are therefore younger than those further away.
Where is crust destroyed?
Just as oceanic crust is formed at mid-ocean ridges, it is destroyed in
subduction zones
. Subduction is the important geologic process in which a tectonic plate made of dense lithospheric material melts or falls below a plate made of less-dense lithosphere at a convergent plate boundary.
What can happen at a transform boundary?
The grinding action between the plates at a transform plate boundary results in
shallow earthquakes, large lateral displacement of rock, and a broad zone of crustal deformation
. Perhaps nowhere on Earth is such a landscape more dramatically displayed than along the San Andreas Fault
What are the 4 types of plate tectonics?
- Divergent: extensional; the plates move apart. Spreading ridges, basin-range.
- Convergent: compressional; plates move toward each other. Includes: Subduction zones and mountain building.
- Transform: shearing; plates slide past each other. Strike-slip motion.
What are the 4 types of plate boundary?
- Convergent boundaries: where two plates are colliding. Subduction zones occur when one or both of the tectonic plates are composed of oceanic crust. …
- Divergent boundaries – where two plates are moving apart. …
- Transform boundaries – where plates slide passed each other.
What happens when two oceanic plates collide?
As with oceanic-continental convergence, when two oceanic plates converge,
one is usually subducted under the other
, and in the process a trench is formed. The Marianas Trench (paralleling the Mariana Islands), for example, marks where the fast-moving Pacific Plate converges against the slower moving Philippine Plate.
What is the 2 types of crust?
Earth’s crust is divided into two types:
oceanic crust and continental crust
. The transition zone between these two types of crust is sometimes called the Conrad discontinuity. Silicates (mostly compounds made of silicon and oxygen) are the most abundant rocks and minerals in both oceanic and continental crust.
How is crust formed?
After the late accretion of the Earth, heat retained by the Earth resulted in the complete melting of the upper mantle, which formed a magma ocean that covered the surface of the Earth. As the Earth cooled,
the magma ocean crystallised
to form a widespread crust [1].
What is the thinnest layer of the Earth?
It is the thinnest layer of the Earth. *The crust is 5-35km thick beneath the land and 1-8km thick beneath the oceans.
