Chapter 5
Deformation of the Crust
Ch. 5.3
Mountain Formation
• Individual mountains are parts of
________________________.
• Adjacent mountain ranges make up a
________________________.
• The largest mountain systems are part of
two even larger systems called
_________________….the circum-Pacific
belt, and the Eurasian-Melanesian belt.
Plate Tectonics and Mountains
• Both mountain belts are along
__________________ plate
boundaries…believed to be responsible
for most mountain formation.
• Some mountain ranges may have formed
where now __________ plate boundaries
may have collided in the
past…______________________.
Continental—Oceanic Collisions
• _______________ causes the continental
crust to be pushed up to form mountains.
• Melting rock creates ________ which rises
to the surface, forming ______________.
• Example…The ___________ mountain
range in the Pacific Northwest.
Oceanic—Oceanic Collisions
• Subduction causes melting of rock.
Magma pushes up through the crust to
form ________________ volcanoes.
• A volcanic ______________ is the result.
The Mariana Islands in the North Pacific
Ocean are the ____________ of volcanic
mountains that rose above sea level.
Continental—Continental Collisions
• No subduction. When continental crust
collides, it is _________________ to form
high ____________ mountains.
• The rock layers are squeezed together like
an ______________.
• Example…the ___________________.
Plateaus
• Large areas of _________________ rock
lifted high above sea level. Found next to
folded mountains.
• The rock layers are pushed upward
_____________________ that they
remain flat instead of deforming and
folding into mountains.