Distribution of tectonic hazards Flashcards
(5 cards)
a hazard
a natuaral/ geophysical event that poses threat to property and life
collision zone
the impacts caused by the indo-australlian plate colliding with the Eurasia plate
Hotspots
At hotspots, there is a hot mass of rising heat under a weakness in a plate.
Magma rises to the surface through this weakness.
The Hawaiian islands all formed as a result of a mid-Pacific hotspot.
intra-plate volcano
happen at hotspots
isolated plumes of convecting heat (mantle plumes) rise towards the surface generating basaltic volcanoes.
The plume remains stationary, although the tectonic plate above moves slowly over it.
intra-plate earthquakes
associated with ancient fault lines being re-activated by tectonic stresses (e.g. minor earthquakes in the UK).
Zones of weakness are created as plates move and stresses increase.