Convergent and Transform Boundaries

The two types of crust are oceanic and continental The two types of crust are oceanic and continental. Oceanic crust is more dense than continental crust.

Convergent boundaries push together.

Subduction is the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate. The more dense plate will go under the less dense plate.

The three types of convergent boundaries are Continental-Continental Oceanic-Oceanic Oceanic-Continental

When continental crust meets continental crust at a convergent boundary, a collision occurs, resulting in folds, faults, and high mountains.

Ocean trench is a long narrow trench that forms when one plate goes under another at a convergent boundary. This can be oceanic-oceanic OR oceanic-continental.

At convergent boundaries oceanic plates will go under continental plates because oceanic crust is more dense than continental crust.

Oceanic-continental convergent boundaries can form mountains.

At convergent plate boundaries known as subduction zones, a trench and deep earthquakes mark the zone where a slab of oceanic lithosphere descends into the mantle, and volcanoes and mountain ranges form on adjacent land.

Oceanic crust is younger at an ocean ridge (divergent boundary) and older near a trench (convergent boundary).

Transform plates slide past one another.

Transform boundaries connect other plate boundaries and are characterized by earthquakes.

The San Andreas Fault in California is a transform boundary   The San Andreas Fault in California is a transform boundary. This is a very active boundary causes earthquakes .  

 Earthquakes represent sudden breaks in crust continuously stressed by plate movement. Gradually over time, the same movements result in major crustal features.