Mountain Building Quiz | Mountain Building Objective Type Questions and Answers

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Questions
21 The North America Cordillera formed by the collision of North America and _______.
A Asia
B South America
C Africa
D numerous continental and oceanic fragments - microplates

Answer: numerous continental and oceanic fragments - microplates
22 Which of the following mountain belts is a mirror image of the Appalachians?
A Alps
B Himalayas
C Urals
D Mauritanides

Answer: Mauritanides
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23 Which of the following mountain belts formed as a result of a collision between two continents?
A Applachians
B Himalayas
C Urals
D all of these

Answer: all of these
24 When did the modern North Atlantic Ocean begin to open?
A about 100 million years ago
B about 200 million years
C about 300 million years ago
D about 500 million years ago

Answer: about 200 million years
25 The thrust sheets of the Blue Ridge and Piedmont provinces moved approximately _____ over the continental shelf sediments of ancient North America.
A 250 meters
B 2.5 kilometers
C 25 kilometers
D 250 kilometers

Answer: 250 kilometers
26 The Applachian Mountains consist of _________.
A deformed continental shelf sediments
B an accreted island arc
C an accreted continental fragment
D all of these

Answer: all of these
27 When did Africa collide with North America?
A Ordovician
B Jurassic
C Permian
D Devonian

Answer: Devonian
28 In the Applachian Mountains, a second orogenic period occurred in _______time when an island arc collided with North America.
A Ordovician
B Jurassic
C Permian
D Devonian

Answer: Permian
29 Which of the following physiographic regions in the Appalachian Mountains is the most intensely deformed?
A the Applachian plateau
B the Blue Ridge
C the Piedmont
D the Valley and Ridge

Answer: the Piedmont
30 Most of the Applachian Mountains formed during ________ time.
A Cenozoic
B Mesozoic
C Paleozoic
D Precambrian

Answer: Paleozoic
31 Which of the following physiographic regions is not part of the Applachians?
A the Valley and Ridge
B the Piedmont
C the Blue Ridge
D the Basin and Range

Answer: the Basin and Range
32 Which of the events listed above occurred before the collision of India and Eurasia?

I. formation of the Main Boundary Thrust

II. formation of the Main Central Thrust

III. collision of the Indian and Eurasian continents

IV. formation of a volcanic arc on the southern edge of Eurasia

A I
B II
C IV
D I, II and IV

Answer: IV
33 Which of the following lists correctly gives the sequence of events that led to the development of the Himalayas?

I. formation of the Main Boundary Thrust

II. formation of the Main Central Thrust

III. collision of the Indian and Eurasian continents

IV. formation of a volcanic arc on the southern edge of Eurasia

A I > II > III > IV
B IV > III > II > I
C III > II > I > IV
D II > I > IV > III

Answer: IV > III > II > I
34 The Valley and Ridge province of the Appalachian Mountains consists of Paleozoic sedimentary rocks that have been thrust to the _________.
A northeast
B northwest
C southeast
D southwest

Answer: northwest
35 The Himalayas began to form approximately _________ when the Indian subcontinent began to collide with Tibet.
A 5 million years ago
B 50 million years ago
C 500 million years ago
D 1 billion years ago

Answer: 50 million years ago
36 The rock assemblages in the Interior Platform of North America indicate deposition _____________
A in extensive shallow seas
B on alluvial plains
C in lakes and swamps
D all of these

Answer: all of these
37 How thick is the sequence of sedimentary rocks that underlies the Great Plains?
A about 400 meters
B about 2 kilometers
C about 10 kilometers
D about 50 kilometers

Answer: about 400 meters
38 What type of geologic contact separates the rocks of the Canadian Shield from the rocks of the Great Plains?
A an unconformity
B a glacial moraine
C a thrust fault
D an intrusive contact

Answer: an unconformity
39 Where are the oldest rocks in North America found?
A Canadian Shield
B Rocky Mountains
C Applachian Mountains
D Ural Mountains

Answer: Canadian Shield
40 Large areas consisting of very old, exposed crystalline basement rocks are called __________.
A orogenies
B cordillera
C basins
D shields

Answer: shields

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