Where do cooler older oceanic lithosphere sinks into the mantle at?
chapter 3 geol
| Question | Answer |
|---|---|
| Cooler, older, oceanic lithosphere sinks into the mantle at ________. | subduction zones along convergent plate boundaries |
| Deep ocean trenches are surficial evidence for ________. | sinking of oceanic lithosphere into the mantle at a subduction zone |
Where in the ocean does oceanic lithosphere sink into the mantle?
Subduction zones
Where is new oceanic crust and lithosphere formed at?
midocean ridges
Where is the oldest oceanic lithosphere found?
Atlantic Ocean basin
How old is the oldest oceanic crust on Earth?
about 340 million years
At what location is most lithosphere destroyed?
Unit 2 Review
| Question | Answer |
|---|---|
| At what location is most lithosphere created? | mid-ocean ridge |
| At what location is most lithosphere destroyed? | subduction zones |
| What are the three process used to explain the plate tectonic theory? | slab pull, convection currents, ridge-push |
What is the weaker hotter zone beneath the lithosphere?
That is called the asthenosphere.
What material do scientists believe makes up a large part of the upper mantle?
peridotite
What boundary is lithosphere destroyed?
convergent boundaries
What are some examples of divergent boundaries?
Examples
- Mid-Atlantic Ridge.
- Red Sea Rift.
- Baikal Rift Zone.
- East African Rift.
- East Pacific Rise.
- Gakkel Ridge.
- Galapagos Rise.
- Explorer Ridge.
What are the three types of boundary movements?
Tectonic Plates and Plate Boundaries
- There are three main types of plate boundaries:
- Convergent boundaries: where two plates are colliding.
- Divergent boundaries – where two plates are moving apart.
- Transform boundaries – where plates slide passed each other.
What does a divergent boundary look like?
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. Two plates sliding past each other forms a transform plate boundary.
What two features are commonly found at divergent boundaries?
Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges. While the process of forming these mountain ranges is volcanic, volcanoes and earthquakes along oceanic spreading ridges are not as violent as they are at convergent plate boundaries.
What landforms are created by divergent boundaries?
Answer and Explanation: Two landforms that are created from divergent boundaries are rift valleys and mid-oceanic ridges.
What happens at a Oceanic Oceanic divergent boundary?
Oceanic-Oceanic Plate Divergence is the divergence of plate boundaries of oceanic plates. When the oceanic plates move away from each other,magma rises from the mantle to cools and solidifies to form new sea floor, this is called sea-floor spreading.
Where is a divergent oceanic oceanic boundary?
Divergent boundaries are spreading boundaries, where new oceanic crust is created to fill in the space as the plates move apart. Most divergent boundaries are located along mid-ocean oceanic ridges (although some are on land).
Where are oceanic oceanic convergent boundaries found?
We continue our trip up western North America to find a convergent plate boundary where oceanic crust subducts beneath oceanic crust. North of the contiguous U.S. lies Canada, and north of Canada lies Alaska. A line of volcanoes, known as the Aleutian Islands, is the result of ocean-ocean convergence.
What is an oceanic oceanic boundary?
At an ocean-ocean convergent boundary, one of the plates (oceanic crust and lithospheric mantle) is pushed, or subducted, under the other (Figure 4.6. 1). Often it is the older and colder plate that is denser and subducts beneath the younger and warmer plate.
What is the effect of oceanic Oceanic?
Oceanic – oceanic convergence As the slab sinks deeper into the mantle, it releases water from dehydration of hydrous minerals in the oceanic crust. This water reduces the melting temperature of rocks in the asthenosphere and causes partial melting.
What does an oceanic oceanic convergence give rise to?
volcanic island arcs. continental volcanic mountains. valleys and ridges.
What landforms are created by Oceanic Oceanic?
Landforms under the ocean are:
- continental shelf,
- continental slope,
- continental rise,
- abyssal plain,
- mid-ocean ridge,
- rift zone,
- trench,
- seamount/guyot.
What landforms are created by an oceanic vs Oceanic divergent boundary?
Collisions of two plates may create everything from fold mountains to oceanic trenches; divergent plates come marked by mid-ocean ridges.
What forms when two oceanic plates collide?
A subduction zone is also generated when two oceanic plates collide — the older plate is forced under the younger one — and it leads to the formation of chains of volcanic islands known as island arcs. Earthquakes generated in a subduction zone can also give rise to tsunamis.
What landforms can Earthquakes create?
Earthquakes churn up minerals from the depths that are vital to life and valuable to humans. They create valleys, lakes, bays, and oceans — diverse habitats for life to thrive and differentiate.
Does an earthquake destroy or reshape the planet?
Earthquakes can cause immense damage to buildings and infrastructure, trigger tsunamis, and reshape the Earth’s surface with their force.
Can earthquakes create mountains?
Those pieces, called “tectonic plates”, move and bump into each other. This bumping creates earthquakes, which slowly push the ground surface upward to make mountains.
Do mountains prevent earthquake?
According to the research of Professor Mark van der Meijde, mountains influence the impact of earthquakes. The mountains can reduce the power of quakes but also send them to certain places, making them more powerful than expected.