They move closer and
toward each other making
a collision.( Volcano)
Type of stress on plates : Tension stresses
What forms?:A collision can produce tall mountains, Ocean trenches, and volcanic arcs
Where is it happening?:Mount Shasta , california.
West coast of south america.
An example is the Nazca Plate is sub ducting beneath the South American plate.
Divergent boundary
How do plates move?: They move away from each other, in the opposite direction
Type of stress on plates: Compression stresses.
What forms?: submarine mountain ranges called oceanic spreading ridges.
Where is it happening?: Juan de fuca ridge,
Washinton
Oregon
Africa
Tranform boundary
How do plates move? Tectonic plates slide horizontally past each other.
Transform boundary.
Type of stress on plates?: Shear stresses.
What forms?:Transform faults, also form and can separate sections of mid-oceanic ridge.
Where is it happening? : California, san Andreas, Africa, South America.
The western half of California is moving north because it is part of the Pacific Plate, and the eastern half of California is moving south because it is part of the North American Plate.