What is an example of a modern convergent boundary?
Ocean-ocean and continent-continent collisions are two other types of convergent boundaries. The Andes mountains of South America are a modern example of the boundary illustrated in Figure 3.
Which type of plate boundary is characterized by arcs of Stratovolcanoes and deep ocean trenches?
Cards
| Term _______was the flora that was widely distributed throughout the once contiguous,, late Paleozoic Southern Hemisphere landmass. | Definition Glossopteris |
|---|---|
| Term characterized by arcs of stratovolcanoes and deep- ocean trenches | Definition convergent |
| Term the Mid-Atlantic Ridge | Definition divergent |
•Apr 9, 2012
Which was proposed as evidence supporting the existence of Pangaea?
As Alfred Wegener—creator of the continental drift theory—noticed in the early 20th century the Earth's continents seemed to fit together like a jigsaw puzzle. This is the most significant evidence for Pangea's existence.
Which one of the following is an important fundamental assumption underlying the plate tectonic theory?
Which one of the following is an important fundamental assumption underlying the plate tectonic theory? Earth's diameter has been essentially constant over time.
What is a divergent 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.
What is continental convergent boundary?
A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other, a process known as subduction. The subduction zone can be defined by a plane where many earthquakes occur, called the Wadati–Benioff zone.
Which type of plate boundary creates a zone of tension by moving the plates apart?
Divergent Boundaries Divergent plate boundaries exist where tectonic plates are under tension— essentially being pulled apart. This tension leads to the upwelling of magma, which forces its way through the separating crust onto the surface.
What is the continental crust boundary?
At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.
What boundary creates rift zones?
Areas where plates are colliding form convergent boundaries, and areas where plates are expanding create divergent boundaries. Rift valleys are formed by divergent boundaries that involve continental plates.
What is convergent boundary?
When two plates come together, it is known as a convergent boundary. The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor trench.
What type of plate boundary occurs where two plates are moving apart from one another?
Divergent boundaries Divergent boundaries. Divergent boundaries occur along spreading centers where plates are moving apart and new crust is created by magma pushing up from the mantle.
What are the convergent plate boundaries?
A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other, a process known as subduction. The subduction zone can be defined by a plane where many earthquakes occur, called the Wadati–Benioff zone.
What does a convergent boundary form?
Convergent boundaries can form mountains, volcanos, or subduction zones that form large trenches. When two plates collide, the crusts can push together to form mountain ranges. This is how the Himalayan mountains were formed. Convergent boundaries between oceanic and continental boundaries feature a subduction zone.
What does a divergent boundary form?
A divergent plate boundary often forms a mountain chain known as a ridge. This feature forms as magma escapes into the space between the spreading tectonic plates.
Which type of plate boundary pulls apart?
Divergent Boundaries Divergent Boundaries — Spreading Plates As plates made of oceanic crust pull apart, a crack in the ocean floor appears.
What are the convergent boundary?
A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other, a process known as subduction.
How are rift zones formed?
Rift zones are areas of weakness in the volcano which form early in its lifetime, likely due to spreading of the volcano as it settles. This linear area that is being rifted, or pulled apart, remains active through most of the volcano's building stages.
Is a rift valley convergent?
Areas where plates are colliding form convergent boundaries, and areas where plates are expanding create divergent boundaries. Rift valleys are formed by divergent boundaries that involve continental plates.
What are convergent and divergent plate boundaries?
Divergent boundaries are boundaries where plates pull away from each other, forming mild earthquakes and volcanoes as magma comes to the surface. Convergent boundaries are boundaries where two plates are pushing into each other.
When two of Earth’s plates pull apart it is called?
Divergent or constructive plate boundaries. The plates diverge and this causes the construction of new rock. It happens when two tectonic plates pull apart and rock from the mantle rises up through the opening to form new surface rock when it cools.
Which is associated with divergent boundaries?
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.
What type of plate boundary does rift volcano occur?
Rift volcanism occurs at divergent plate boundaries. Spreading plates create large cracks or rifts that allow magma to seep up from within the mantle.
What type of plate boundary produces a rift valley?
Divergent boundaries Divergent boundaries – where two plates are moving apart. Divergent boundaries within continents initially produce rifts, which produce rift valleys. The most active divergent plate boundaries are between oceanic plates and are often called mid-oceanic ridges.
What does conservative plate boundary mean?
Conservative margins are also known as transform faults. Transform faults are mainly found on the ocean floor, where they offset mid ocean ridges and enable to ocean to spread at different rates.
What is constructive plate boundary?
Constructive plate boundaries or margins are regions where new oceanic crust is being generated. However, in order for the magma to ascend to the surface and build new lithosphere, the earlier formed crust must be pulled apart and fractured to create a new magma pathway.
What happens at a convergent plate boundary?
Convergent (Colliding): This occurs when plates move towards each other and collide. When a continental plate meets an oceanic plate, the thinner, denser, and more flexible oceanic plate sinks beneath the thicker, more rigid continental plate. This is called subduction.
How is a rift zone formed?
Rift zones are areas of weakness in the volcano which form early in its lifetime, likely due to spreading of the volcano as it settles. This linear area that is being rifted, or pulled apart, remains active through most of the volcano's building stages.
Is a rift valley convergent or divergent?
divergent boundary Many rift valleys are part of “triple junctions,” a type of divergent boundary where three tectonic plates meet at about 120° angles. Two arms of the triple junction can split to form an entire ocean. The third, “failed rift” or aulacogen, may become a rift valley.
What plate boundary causes rift valleys?
Divergent plate boundaries Divergent plate boundaries, which are associated with the formation of rift valleys, occur when plates move away from one another. Convergent plate boundaries move toward one another, pushing into one another and are likely to create mountain ranges.
What type of plate boundary is there in rift valley?
divergent boundary Many rift valleys are part of “triple junctions,” a type of divergent boundary where three tectonic plates meet at about 120° angles. Two arms of the triple junction can split to form an entire ocean.