Download Mountain Building

Mountain Building
Quick Write
In this chapter, you will learn about
the process of mountain building.
Write down these questions and
answer them in complete sentences.
1. Where would you expect to find mountains
on planet Earth?
2. What type of boundary would you expect to
find most mountains?
3. Where is a hot spot within the continental
U.S.?
1. % of mts. above and below
sealevel?
Above = 30%
Below = 70% (MOR and others)
2. Density of rocks?
The higher the D in rock,
the lower it floats in
mantle.
3. Crust types?
Basalt = higher density
Granite = lower density
4. Isostatic rebound?
As mts erode their mass
decreases. Mts float
higher increasing in
elevation.
5. Example of isostatic
rebound?
Appalachian Mts. used to
be at a plate boundary.
Check for Understanding
Where are most mountains found?
_____ is the more dense crustal rock and
floats lower, while _____ is the less dense
crustal rock and floats higher in the mantle.
Granite/Basalt or Basalt/Granite
Movie
6. OO convergence?
•Subduction
•Crust melting
•Volcanic island chain
7. Uplift?
The plate that shoves the
other under is pushed up.
8. Examples?
Japanese islands.
9. OC convergence?
•Subduction
•Crust melting
•Volcano mtn. chain
10. Uplift?
Yes, same as with OO.
11. Examples?
Cascades & Andes.
Check for Understanding
What 3 things do you get with both
OO and OC convergence?
______ is the process of crust being raised up
when a plate is subducted underneath.
Movie
12. CC convergence?
•Deformed mts
•Fractured mts
•Very tall mts
13. Marine sediments?
Sedimentary rocks with
marine fossils are found in
the tallest mts.
From an ocean basin that
was closed when Indian
continent shoved into Asia.
14. Appalachians?
Formed when Africa, Europe, and S. America collided
with N. America.
Check for Understanding
What type of convergence has created
the tallest mtn. range in the world?
OC or CC
The ________ mts. were formed with Africa,
Europe, and S. America collided with N. America.
15. Other mts?
•DPB
•Fault block mts
•Hot spot mts
16. Ocean ridges?
•Formed at DPB
•Mainly igneous rocks
•Form long gently sloping
volcanic mtn ranges
17. Non-boundary mts?
Uplifted mts: Adirondacks
Fault-block: Grand Tetons
Hot spot: Hawaiian Islands
18. Adirondacks?
Large region of crust
slowly uplifted as a unit.
19. Fault-block mts?
Large regions of crust
are tilted, uplifted, or
dropped downward
between large faults.
20. Hot spots?
Volcanoes formed when
crust rotates over a
spot where magma has
burned through.
21. Yellowstone?
Location where
continental crust is
thinner.
Geothermal activity
and possible future
volcanism.
Check for Understanding
What type of boundary is responsible for
the longest mountain chain in the world?
Convergent or Divergent or Transform
The ______ are a result of uplift. The ______
are an example of fault-block mountains. The
_____ are an example of volcanoes at a hot spot.
Movie