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Earthquakes > Tectonic Processes > Flashcards

Tectonic Processes Flashcards

1
Q

What is compression?

A

Bending of rocks until they fracture and move suddenly long fault lines

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2
Q

What is compression most obvious?

A

At convergent plate boundaries and subduction zones

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3
Q

Where is an example of compression?

A

Kashmir 2005

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4
Q

What kind of earthquakes occur from compression force?

A

High magnitude earthquakes

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5
Q

What is tension?

A

Stretches the crust leading to faulting and rifting

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6
Q

What is rifting?

A

Blocks of crust slip Downwards

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7
Q

What kind of earthquakes does the movement of rifting with tension force cause?

A

Shallow earthquakes

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8
Q

What plate boundaries is tension associated with?

A

Divergent

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9
Q

What is shearing?

A

Strike slip fault

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10
Q

What plate boundaries is shearing most commonly at?

A

Divergent

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11
Q

What kind of earthquake does a strike slip fault and shearing cause?

A

Movement is erratic and sudden and produces violent quakes

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12
Q

What were the tectonic processes in Haiti?

A

Conservative plate boundary of the North American and Caribbean plates
Strike slip fault and compression

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13
Q

What were the tectonics of the Kashmir earthquake?

A

Indo-Australian and Eurasian continent collision

Forming fold mountains (Himalayas)

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14
Q

What are the three tectonic forces?

A

Compression
Tension
Shearing

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15
Q

What are the three different types of faults?

A

Normal dip-slip fault
Reverse dip-slip fault
Strike slip fault

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16
Q

What is a dip-slip fault?

A

Fault plane dips away from the uplifting block

Faulting results from tension in the crustal rocks

17
Q

What is a reverse dip-slip fault?

A

The fault plans dips beneath the uplifted block

18
Q

What is a very low angled reverse dipslio fault called?

A

A thrust fault

19
Q

What does the faulting in a normal dip slip fault result from?

A

Tension in the crustal rocks

20
Q

What does faulting In the reverse dip slip fault result from?

A

Compression in the crust

21
Q

What is a strike slip fault?

A

Blocks slide past each other

22
Q

What are the four main types of plate boundary?

A

Divergent
Convergent
Conservative
Collision

23
Q

What is happening at a divergent plate boundary?

A

Moving apart - mid ocean ridges

24
Q

What is happening at a convergent plate boundary?

A

2 plates colliDe

Where there is an oceanic and a continental there is a subduction zone (forms a deep trench)

25
Q

What is happening at a collision?

A

Continent vs continent

Sediment between them get trapped and fold

26
Q

What is happening at a conservative boundary?

A

Two plates move past with no formation or destruction of crust
Intensive earthquake activity

Earthquakes (3 decks)

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