Download 3 Types Of Plate Boundaries And What They Create

3 Types Of Plate Boundaries And What They Create
1. DIVERGENT:
plates pull apart due to tension
Types of Crust
← →
Land Forms Created
Where Is It on Earth
Continental/Continental
 Rift valleys
Red Sea Rift
Oceanic/Oceanic
 Mid-oceanic ridges
 New sea floor
Mid-Atlantic Ridge
2. CONVERGENT:
plates crash or collide
into each other due
to compression. Sea
floor is destroyed at
subduction zones.
→←
SUBDUCTION ZONE
SUBDUCTION ZONE
Pictures at right
a. oceanic
converging into
continental
b. oceanic
converging into
oceanic
c. continental converging into continental
Convergent Plate Boundaries Continued….
Types of Crust
Oceanic/Continental
Oceanic/Oceanic
Continental/Continental
Land Forms
Created
Trenches
Where Is It on
Earth
Mariana
Trench
Volcanic
mountains on the
coastline
Mt. St. Helens
and Mt. Rainier
Trenches
Peru-Chile
Chain of volcanic
islands
Aleutian
Islands
Mountain Ranges
Himalayas
Is There
Subduction?
YES…Sea
floor is
destroyed
YES…Sea
floor is
destroyed
NO…crust
is pushed
up
3. TRANSFORM:
plates slide past each
other due to shearing. Crust is neither created
nor destroyed.
↑↓
Types of Crust
Continental/Continental
Land Forms Created
Strike-slip fault….
Earthquakes happen
here
Where Is It on Earth
San Andreas Fault
AMAZING EARTH SCIENCE FACTS
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New ocean floor is created at mid-ocean ridges. Crust is youngest here at the
ridges due to rising magma.
At divergent boundaries, ridges are formed where magma comes up through the
sea floor
At convergent boundaries (Continental-Oceanic), the denser plate (oceanic)
subducts beneath the continent plate.
An oceanic plate will always sink under a continental plate because it is denser.
When two continents collide mountains are made –example is Mt. Everest in the
Himalayas
Transform boundaries slide past each other. (Ex. San Andreas Fault)
Volcanic activity is always associated with subduction.