Plate Boundaries, Stresses, Faults
Remember: The Lithosphere is made of crust + upper rigid mantle & plates may be called crustal, lithospheric and/or tectonic plates
Boundary Type:
Stress:
Fault:
How/Where does it
happen?
How is the rock pushed,
pulled or changed?
How does the rock break
after it is stressed?
Divergent Boundary
Tension Stress
Normal Fault
May form ________
____________ on continents
Place where 2 plates
pull away from each
other
Rock gets _________ in
the middle as it is
_______________
apart.
The stress is called
_____________.
Rock ___________ down
as it breaks
(Ex: Rio Grande in NM) Earthquakes
may occur or volcanoes may form
where magma reaches the surface)
(fault is at an angle, so 1 block
lies above the fault {foot wall}
& 1 block lies below the faults
{hanging wall})
Geologic Feature OR
Event:
What happens as a result of
the plate movement?
OR
___________________
___________________
in the ocean (magma/lava “bubbles”
Hints:
To help remember or
make the connection…
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Dissecting
Dividing
Pulling warm
bubble gum or
silly putty apart
until it breaks
Happens @
different places
on Land & H2O
up through breaks in the crust)
Convergent Boundary
Compression Stress
Reverse Fault
May form
_____________________
______________ (folded mtns
Place where 2 plates
crash/crunch together
or subduct (one sinks
under)
Rock is pressed or
___________________
___________________
This stress is called
_______________.
Rock is forced
__________ as it is
squeezed
(hanging wall & foot wall are
OPPOSITE from Normal Fault)
oceanic plate dives under less dense
continental plate)
Transform Boundary
Shearing Stress
Strike-Slip Fault
May cause
_______________________
Place where 2 plates
slide past each other
Rock is pushed in two
___________________
___________________
or sideways but no rock
is lost.
The stress is called
_______________.
Rocks on each side of the
fault _______________
___________________
_____________ as they
break
= Rockies & Himalayas)
May form _______________
@ Subduction Zones (as denser
(when rock snaps from the pressure
build up, Ex: San Andreas Fault in CA)
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Connecting
Trash compactor
Mountain Ranges
= Rock goes up
Subduction =
Submarines
Sub stem“under”
Trains going past
each other in
different
directions, shake
the ground
Rock is
“sheared” or cut
“Shears” =
Scissors