tectonics

• an 'oblique-slip fault' occurs when both blocks move sideways as well as up or down.
• a 'normal fault' occurs when two blocks move apart, with one block moving downwards relative to the other.
• 'fault' is the fracture along which movement has occurred
• 'normal faulting' is where the upper block moves down relative to the lower one
• 'reverse faulting' is where the upper block moves up relative to the lower one
• 'strike slip faulting' is where there is no vertical movement, just horizontal movement along the fault plane
• 'reverse faulting' is where two blocks are forced together, with one block being pushed up relative to the other.
• the San Andreas Fault runs through California
• 'epicentre' is the point on the surface directly above the hypocentre
• 'hypocentre' is the point within the Earth where an earthquake originates
• The Himalayas were formed by collision between India and Asia
• 'strike slip faulting' is where the upper block moves horizontally past the lower one
• 'convergent plate boundaries' are where plates collide head on
• the San Andreas Fault runs through California and is an example of strike-slip faulting.
• the San Andreas Fault runs through California and is an example of a strike-slip fault
• 'magnitude' is a measure of how big an earthquake was - it depends on the size of the waves generated by the earthquake
• 'divergent plate boundaries' are where plates pull away from eachother
• The Himalayan mountain range was formed by collision between India and Asia
• The San Andreas Fault is an example of 'transform boundary', as it marks the point at which two plates slide past eachother horizontally
• The Himalayan mountain range was formed by collision between India and Asia.
• 'magnitude' measures how much energy was released by the earthquake
• At divergent boundaries, magma rises from the mantle and forms new crust on either side of the plate margin
• 'magnitude' measures how much energy was released during an earthquake
• A transform boundary occurs when two plates move sideways against each other
• 'hypocentre' is the point below the Earth's surface at which an earthquake originates
• A rift valley forms as magma pushes its way towards the surface from below
• A rift valley forms as magma pushes its way towards the surface from below.
• An earthquake occurs when rocks at the boundary between two plates suddenly break apart due to pressure build-up from plate movement
• 'transform plate boundaries' are where plates slide past each other
• 'divergent plate boundaries' are where plates move away from each other
• A 'focal depth' is how deep below the Earth's surface the epicentre lies
• The Mid Atlantic Ridge was formed by divergent plate boundaries
• 'intensity' measures the effects that were felt from the earthquake
• 'intensity' measures the effects that were felt from the earthquake
• 'focus' is the point below the Earth's surface at which an earthquake begins
• 'seismograph' records ground movements caused by seismic waves from an earthquake
• 'seismograph' records ground movements caused by seismic waves from an earthquake
• 'focus' is the point below the Earth's surface at which an earthquake begins
• 'seismograph' records ground movements caused by seismic waves from an earthquake
• The Andes Mountains were formed by subduction at the Peru-Chile Trench