Transform boundaries typically produce large, shallow-focus earthquakes. Although earthquakes do occur in the central regions of plates, these regions do not usually have large earthquakes.
Q. Which of the boundaries can produce earthquakes?
Movement in narrow zones along plate boundaries causes most earthquakes. Most seismic activity occurs at three types of plate boundaries—divergent, convergent, and transform. As the plates move past each other, they sometimes get caught and pressure builds up.
Table of Contents
- Q. Which of the boundaries can produce earthquakes?
- Q. Which of the above boundaries can produce volcanoes?
- Q. Where are most divergent boundaries found?
- Q. What happens to continental crust when two continents collide?
- Q. Where is the youngest rock found at a divergent boundary?
- Q. Which type of rock is the least common on Earth?
- Q. What type of rock is found at a transform boundary?
- Q. Why isnt the ocean floor older?
- Q. How old is the youngest seafloor?
- Q. Where is the newest seafloor?
- Q. What is the most likely cause of plate movement?
Q. Which of the above boundaries can produce volcanoes?
The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries.
Q. Where are most divergent boundaries found?
mid-ocean ridge system
Q. What happens to continental crust when two continents collide?
When two plates carrying continents collide, the continental crust buckles and rocks pile up, creating towering mountain ranges. When an ocean plate collides with another ocean plate or with a plate carrying continents, one plate will bend and slide under the other. This process is called subduction.
Q. Where is the youngest rock found at a divergent boundary?
Period 3- Open Notes Test Review
| Question | Answer |
|---|---|
| At a divergent boundary, where is the youngest rock found? | at the mid-ocean ridge |
| At a divergent boundary, where is the oldest rock found? | far away from the mid-ocean ridge |
| What type of boundary creates new sea floor? | divergent |
Q. Which type of rock is the least common on Earth?
Sedimentary rocks
Q. What type of rock is found at a transform boundary?
The sedimentary and metamorphic rocks across the fault line are similar to those found in Redwood National and State Parks on the North Coast of California. They were lifted out of the ocean as part of the accretionary wedge of an ancient subduction zone.
Q. Why isnt the ocean floor older?
In essence, oceanic plates are more susceptible to subduction as they get older. Because of this correlation between age and subduction potential, very little ocean floor is older than 125 million years and almost none of it is older than 200 million years.
Q. How old is the youngest seafloor?
Very little of the sea floor is older than 150 million years. This is because the oldest sea floor is subducted under other plates and replaces by new surfaces. The tectonic plates are constantly in motion and new surfaces are always being created.
Q. Where is the newest seafloor?
The newest, thinnest crust on Earth is located near the center of mid-ocean ridge—the actual site of seafloor spreading. The age, density, and thickness of oceanic crust increases with distance from the mid-ocean ridge.
Q. What is the most likely cause of plate movement?
The internal heat of the earth is the most likely cause of plate movement; this heat is probably generated by the decay of radioactive minerals. The entire surface of the earth is moving, and each plate is moving in a different direction than any other.
