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Convergent Plate Boundaries 10/6/15
7-3b pg. 178
IN: What do you think
happens when tectonic
plates collide?
Convection
 Hot
material deep within the Earth
rises while cooler material near
the surface sinks.
◦ This is what causes tectonic plates to
move around.
Ridge Push
 The
process by which an oceanic
plate slides down the lithosphereasthenosphere boundary.
Slab Pull
 The
process by which the edge of
the oceanic plate sinks and pulls
the rest of the tectonic plate with it.
These plates are moving
around.
 Which
means that they:
◦ Convergent Boundary
 Collide  run into one another
◦ Divergent Boundary
 Divide  move away from one
another
◦ Transform Boundary
 Slide slide past one another
Convergent Boundaries
 Collide
 When
two tectonic plates push
into one another.
3
types:
◦ Continental/Continental
◦ Continental/Oceanic
◦ Oceanic/Oceanic
 Forms
mountains.
Himalayan Mountains
 Forms
land volcanoes and trenches.
Subduction Zones
 The
region where oceanic plates sink
down into the asthenosphere.
◦ Forms deep sea trenches.
Mariana Trench
-7 miles deep.
-If Mount Everest, the highest mountain on Earth
at 8,850 meters (29,040 ft), was set in the
deepest part of the Mariana Trench, there would
be 2,060 meters (6,760 ft) of water left above it.
http://deepseachallenge.com/

Forms ocean volcanoes and islands.
OUT:
At a continental/continental
collision why does the
lithosphere buckle upward
and not downward?
Convergent Boundaries