Convergent Plate Boundaries Flashcards
(15 cards)
What happens when two oceanic plates collide?
The older, denser plate subducts under the other.
What forms at an oceanic-oceanic boundary?
A deep ocean trench and a volcanic island arc.
Example of an oceanic-oceanic convergent boundary?
Mariana Trench and Mariana Islands.
What happens when an oceanic and a continental plate collide?
The denser oceanic plate subducts beneath the continental plate.
What forms at the oceanic-continental boundary?
A deep ocean trench and volcanic mountains on land.
Example of an oceanic-continental convergent boundary?
Peru-Chile Trench and the Andes Mountains.
What happens when two continental plates collide?
They crumple and push upward (neither subducts).
What forms at the continental-continental boundary?
Large mountain ranges and earthquakes.
Example of a continental-continental convergent boundary?
The Himalaya Mountains (Indian and Eurasian plates).
How do mountain ranges form?
When two continental plates collide.
This process is known as orogeny.
What are volcanic island arcs?
Chains of volcanoes formed by oceanic-oceanic plate convergence.
These arcs are typically found at convergent boundaries.
Where do mid-ocean ridges form?
At divergent oceanic plate boundaries.
Mid-ocean ridges are characterized by volcanic activity.
What is a rift valley?
A valley formed when continental plates pull apart.
Rift valleys can lead to the formation of new ocean basins.
What forms deep ocean trenches?
At subduction zones where one plate sinks below another.
These trenches are the deepest parts of the ocean.
