faulting Flashcards
landforms caused by faulting
rift valley e.g. African rift valley
what happens when the rocks of the earths crust are pulled apart or compressed by the movement of tectonic plates
they often crack
whatvare the cracks that from called
faults
when do reverse faults occur
the land along a fault is moved upwards during compression
what happens if the land is being stretched
land may sink downwards along a fault
what is this called
normal fault
when does a rift valley form
when stretching of the crust causes the land between two parallel faults to sink
what ar the faults in a rift valley
normal faults
what does the land between the faults form
flat floored valley with steep slopes on each side
what is called when the slopes mark the fault lines
fault scraps
what happened in the African rift valley
stretching and faulting of the crust is occurring as a hotspot of magma is Ising underneath the crust, pushing it up and stretching it
what is the African rift valley over
5,000 kilometres long and varies in width from 30 - 100 kilometres wide
when do reverse faults form
further compression forces the land upwards between n the reverse faults
diagram
