Plate Margins and landforms
Terms in this set (15)
a boundary between two plates that are moving together and where one,consisting of oceanic crust,is subducted and destroyed
deep valley in the ocean floor that forms along a subduction zone
these are mountains formed as the plates move together and folds are formed as the the layers are squeezed horizontally.
Arc-shaped chains of volcanoes that are always found associated with an ocean trench.
Volcanic island arcs
a chain of volcanic islands generally located a few 100 km from a trench where there is active subduction of one oceanic plate beneath another.
Constructive plate margin
When two plates move away or DIVERGE from each other. This causes magma to fill up the space that is left in between, creating a new oceanic ridge. E.g. Eurasian and North American
where the tectonic plates meet each other
a piece of the lithosphere that moves around on top of the asthenosphere
Found where 2 pieces of continental lithosphere meet to create fold mountains
a boundary between two plates that are sliding past each other and where crust is being neither formed nor destroyed
Area where the earth's lithospheric plates move in opposite but parallel directions along a fracture (fault) in the lithosphere.
Mid ocean ridge
an undersea mountain chain where new ocean floor is produced; a divergent plate boundary
A deep valley that forms where two plates move apart.
a large area of flat land elevated high above sea level
Pacific Ring of Fire
Ocean-girdling zone of crustal instability, volcanism, and earthquakes resulting from the tectonic activity along plate boundaries in the region.