Tectonic Hazards Flashcards
Subduction
Process of oceanic lithosphere colliding with and descending beneath the continental lithosphere
Interplate
Boundary BETWEEN two plates
Intraplate
WITHIN the plates
Convection
Movement caused within a fluid.
Details about convection (density)
Hotter, less dense material rises
Colder, denser material sinks
Results in transfer of heat
Seismic
Vibrations of the earth
Radiate from focus of an earthquake
Seismic waves
Elastic wave produced by earthquakes
Slab pull
Pulling force exerted by a cold, dense oceanic plate plunging into the mantle due to its own weight
Theory about slab pull
Oceanic plate is denser than the hotter mantle beneath it so density causes it to sink into the mantle
Destructive (oceanic- continental) movement
Plates collide, the oceanic plate is subducted
Destructive (oceanic- continental) earthquakes
Very violent, up to 9.0 on the Richter scale
Destructive (oceanic- continental) volcanoes
Explosive and destructive
Destructive (continental- continental) movement
Plates collide creating a mountain belt
Destructive (continental- continental) earthquake
Very violent, up to 8.0 on the Richter scale
Destructive (continental- continental) volcanoes
Very rare, but devastating
Constructive (oceanic- oceanic) movement
Plates move apart
Constructive (oceanic- oceanic) earthquakes
Minor, up to 5.0-6.0 on the Richter scale
Constructive (oceanic- oceanic) volcanoes
Effusive, non violent
Conservative (continental- continental) movement
Plates slide past each other
Conservative (continental- continental) earthquakes
Very violent, up to 8.0 on the Richter scale
Conservative (continental- continental) volcanoes
None
Mid plate hotspot movement
Plates move over a zone of magma convection
Mid plate hotspot earthquakes
Minor up to 5.0-6.0 on the Richter scale
Mid plate hotspot volcanoes
Effusive, non violent
