What is an area of deep cracks that forms between two tectonic plates that are pulling away from each other?
Earth Science Earthquakes and Volcanoes
| A | B |
|---|---|
| Rift Zone | Deep cracks between tectonic plates that are pulling apart and form new crust |
| seafloor spreading | pulling apart of plate boundaries under the ocean floor |
| seismic wave | wave produced by energy that is released when rock moves at plate boundaries |
What is formed when two plates are pulled away from each other?
A divergent boundary occurs when two tectonic plates move away from each other. 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 is known as an area of deep cracks at a divergent boundary?
Rift Zone. an area of deep cracks that forms between two tectonic plates that are pulling away from each other. Plate tectonics.
What is an area where a set of deep cracks form?
Grade 6 Tectonics An area where deep cracks form. They are common between tectonic plates that are pulling apart.
What are 3 things that are formed at a transform boundary?
Transform boundaries represent the borders found in the fractured pieces of the Earth’s crust where one tectonic plate slides past another to create an earthquake fault zone. Linear valleys, small ponds, stream beds split in half, deep trenches, and scarps and ridges often mark the location of a transform boundary.
What happens to the crust at a transform boundary?
Transform boundaries — where crust is neither produced nor destroyed as the plates slide horizontally past each other.
What are the 4 plate boundary types?
Tectonic Plates and Plate Boundaries
- 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.
Why are volcanoes not found at transform boundaries?
Why are volcanoes NOT found at transform boundaries? Volcanoes are not found at transform boundaries because they do not cause changes to the pressure, temperature, or composition of the mantle.
What happens when there is 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 in western California.
How do transform boundaries move?
Transform boundaries are areas where the Earth’s plates move past each other, rubbing along the edges. As the plates slide across from each other, they neither create land nor destroy it. Because of this, they are sometimes referred to as conservative boundaries or margins.
When two plates collide and move past one another which of the following is most likely to occur?
When oceanic or continental plates slide past each other in opposite directions, or move in the same direction but at different speeds, a transform fault boundary is formed. No new crust is created or subducted, and no volcanoes form, but earthquakes occur along the fault.
What happens when two oceanic crust collides with each other?
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.
What happens when two crust collide?
At convergent boundaries, where plates push together, crust is either folded or destroyed. When two plates with continental crust collide, they will crumple and fold the rock between them. A plate with older, denser oceanic crust will sink beneath another plate. The crust melts in the asthenosphere and is destroyed.
What happens when two tectonic plates of different densities collide?
When two tectonic plates of different densities collide due to convection currents that are produced by the heat within the asthenosphere, a plate boundary (convergent) is formed. Deep trenches are usually formed where one of the plates slides beneath each other (a process called subduction).
What happens when two plates rub against each other as they move in opposite directions?
Plates Slide Past One Another Plates grinding past each other in opposite directions create faults called transform faults. Powerful earthquakes often strike along these boundaries.