Types of Movement
They are areas located on the edge of tectonic plates where there is a high concentration of volcanoes and earthquakes
What are plate boundaries?
They are created when rocks deform, usually because of compressional stresses.
What is a fold?
They are geological periods in the past during which mountain ranges were formed
What is orogeny?
These are zones where two continents collide. Oceanic lithosphere is destroyed in subduction zones, where ocean floor goes into mantle, while new mountain ranges are formed.
What are convergent boundaries?
These are zones where two plates move apart, creating a raised area of new oceanic lithosphere
What is an oceanic ridge?
They are fractures in the rocks on the Earth's surface where the separated blocks of rocks have been displaced
What is a fault?
They are fractures where two plates slide horizontally against each other, which causes seismic activity.
What is a transform boundary?
They are areas found in folds on either sides of the hinge zone
What is a limb?
It is the area of the fold where it folds the most
What is a hinge zone?
They are fractures in rocks which are formed when the hanging wall block moves down relative to the footwall block
What is a normal fault?
It is an imaginary line found in folds that marks the axial plane of any layer
What is a hinge line?
It is an area that connects the hinge lines of different layers of rock within a fold
What is an axial plane?
They are fractures in rocks which are formed when the hanging wall block moves up relative to the footwall block
What is a reverse fault?
It is a type of fold in which the hinge is positioned above the limbs
What is an anticline?
It is a type of fold in which the hinge is positioned below the limb
What is a syncline?