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Flashcards in Tectonic Processes Deck (26)
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1

What is compression?

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

2

What is compression most obvious?

At convergent plate boundaries and subduction zones

3

Where is an example of compression?

Kashmir 2005

4

What kind of earthquakes occur from compression force?

High magnitude earthquakes

5

What is tension?

Stretches the crust leading to faulting and rifting

6

What is rifting?

Blocks of crust slip Downwards

7

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

Shallow earthquakes

8

What plate boundaries is tension associated with?

Divergent

9

What is shearing?

Strike slip fault

10

What plate boundaries is shearing most commonly at?

Divergent

11

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

Movement is erratic and sudden and produces violent quakes

12

What were the tectonic processes in Haiti?

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

13

What were the tectonics of the Kashmir earthquake?

Indo-Australian and Eurasian continent collision
Forming fold mountains (Himalayas)

14

What are the three tectonic forces?

Compression
Tension
Shearing

15

What are the three different types of faults?

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

16

What is a dip-slip fault?

Fault plane dips away from the uplifting block
Faulting results from tension in the crustal rocks

17

What is a reverse dip-slip fault?

The fault plans dips beneath the uplifted block

18

What is a very low angled reverse dipslio fault called?

A thrust fault

19

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

Tension in the crustal rocks

20

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

Compression in the crust

21

What is a strike slip fault?

Blocks slide past each other

22

What are the four main types of plate boundary?

Divergent
Convergent
Conservative
Collision

23

What is happening at a divergent plate boundary?

Moving apart - mid ocean ridges

24

What is happening at a convergent plate boundary?

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

25

What is happening at a collision?

Continent vs continent
Sediment between them get trapped and fold

26

What is happening at a conservative boundary?

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