Tectonic Processes and Hazards Flashcards
Mantle Convection
Heat rises to the mantle from the inner core. Once it reaches the asthenosphere it cools and drops back down to the lower mantle
Sea Floor Spreading
Movement of oceanic crust away from a constructive plate boundary
Subduction
melting of an oceanic plate as it descends into the mantle at a convergent boundary
Slab Pull
at a subduction zone the descending part of the oceanic plate pulls the rest of the plate with it
Convergent Destructive O-C
oceanic plate subducts below the continental plate which creates faults for the magma to rise and creates strato volcanoes
Convergent Destuctive C-C
plates sliding past each other causing fold mountains and landslides
Convergent destructive O-O
denser oceanic plate subducts creates a line of volcanoes, earthquakes are common which causes tsunamis
Why are some volcanoes more likely alone some plate boundaries than others?
The plate of faults can provide a convenient pathway for magma to reach the surface. The line is found above where the plate subducts
Divergent
Plates pull apart from each other so earthquakes are common
Which plate boundaries create submarine volcanoes
divergent and convergent O-O
Constructive plate boundaries
plates move side by side
What is a rift valley?
where divergents happen, and new crusts form
which plate boundaries create fold mountains
continental convergent
O-C convergent
what causes tsunamis
caused by earthquakes and sometimes volcanic eruptions
why are tsunamis difficult to detect
difficult to detect in the deep ocean because the wave height can only be 0.5m so they won’t know the difference between a tsunami and a wave
