Download Section 11.2 Folds, Faults, and Mountains

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Name ___________________________
Chapter 11
Class ___________________
Date _____________
Mountain Building
Section 11.2 Folds, Faults, and
Mountains
This section explains the characteristics of various types of mountains.
Reading Strategy
Comparing and Contrasting As you read this section, compare types of
faults by completing the table below.
Types of Fault
Description
Normal fault
a. a hanging wall block moves down relative to the footwall block;
high angle fault
b. Reverse fault
c. a hanging wall block moves up relative to the footwall block;
high angle fault
d. Thrust fault
e. a hanging wall block moves up and over the footwall block;
low angle fault
f. Strike-slip fault
g. movement is horizontal and parallel to the trend of the fault surface;
usually consists of a zone of roughly parallel fractures
Match each definition to its term.
Definition
c
a
b
1. large, step-like folds in otherwise
horizontal sedimentary strata
2. upfolding, or arching, of
rock layers
3. downfolds or troughs
Term
a. anticlines
b. synclines
c. monoclines
Faults
4.
Briefly describe each of the following types of faults and select
the appropriate letter in the figure that identifies each fault.
Reverse fault: A hanging wall moves up relative to the footwall.
Strike-slip fault: Dominant displacement is along the trend, or strike, of the fault.
Normal fault: A hanging wall moves down relative to the footwall.
Thrust fault: A hanging wall moves up relative to the footwall at a low horizontal angle.
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Folds
0078_phes09_GRSW_Ch11.QXD 5/9/07 3:36 PM Page 81
Name ___________________________
Chapter 11
Class ___________________
Date _____________
Mountain Building
Types of Mountains
Match each definition to its term.
Definition
b
Term
mountains formed primarily
a. orogenesis
by folding
b. folded mountains
a
6. the collection of processes that
c. compressional forces
produce a mountain belt
c
7. the major force that forms
folded mountains
Thrust-faulting
8.
is also important in the formation of folded
mountains, which are often called fold-and-thrust belts.
5.
9. Circle the letter of the mountain ranges that are examples of folded
mountains.
a. Appalachian Mountains
b. northern Rocky Mountains
B
c. Teton Range in Wyoming
A
d. the Alps in Europe
© Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved.
10. Select the letter from the figure
that identifies each formation.
B
graben
A
horst
11. Which type of fault is illustrated
normal fault
in the figure?
12. Circle the letter of each true statement about fault-block mountains.
a. Normal faulting occurs where tensional stresses cause the crust
to be stretched.
b. Grabens produce an elongated valley bordered by horsts.
c. The Appalachian Mountains are examples of fault-block
mountains.
d. The Basin and Range region of Nevada, Utah, and California
is made of elongated grabens.
Plateaus, Domes, and Basins
13.
When upwarping produces a circular or an elongated
dome
structure, the feature is called a(n)
.
14. Is the following sentence true or false? The Black Hills of western
South Dakota make up a large domed structure thought to be
true
formed by upwarping.
15. Is the following sentence true or false? The Black Hills of South
Dakota contain exposed igneous and metamorphic rock in the
true
center of a dome.
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