Subduction

Question 1

What is the cause of the Subduction Mountains?

Answer 1

Compressional stress

Question 2

Where are the Subduction Mountains located?

Answer 2

Oceanic subduction zones (Japan)

Continental Subduction zones (Andes)

Question 3

Forms where ocean crust goes down a trench

Answer 3

Accretionary Wedge

Question 4

Thrust slices pile up over time with the youngest slice added at the ___

Answer 4

Base

Question 5

Are fold and thrust zones unique to subduction?

Answer 5

No, it also occurs in a collision

Question 6

Where the rocks are hotter and can slide a long distance, you get:

Answer 6

A fold and thrust belt

Question 7

A mix of strong and weak rocks make:

Answer 7

Both folds and faults

Question 8

Unique to continental subduction

Answer 8

Suspect Terranes

Question 9

Smaller continents get dragged toward the trench

Answer 9

Suspect Terranes

Question 10

They can’t subduct so they get added on instead

Answer 10

Suspect Terranes

Question 11

When two large continents collide, they make wide and very complicated mountain belts.

Answer 11

Collision Mountains

Question 12

Different compressional folds and faults form at different locations and depths

Answer 12

Collision Mountains

Question 13

Bring ocean rocks to mountain tops

Answer 13

Thrust faults

Question 14

Form deep underground

Answer 14

Large recumbent folds

Question 15

To remove the ocean between two continents what do you need on at least one side

Answer 15

Subduction

Question 16

Volcanic mountains deform rocks before the continents collide

Answer 16

Active Margin

Question 17

Quiet and undisturbed until it tries to go down the trench

Answer 17

Passive Margin

Question 18

Unique to collision

Answer 18

Suture Zone

Question 19

Ultramafic rocks end up smashed between the two continents, marking the former ocean

Answer 19

Suture Zone

Question 20

Folds and thrusts form on both sides of the:

Answer 20

Suture

Question 21

Deformation is worse on the side that tried to subduct =

Answer 21

The former passive margin

Question 22

Result of being under the two plates of collision

Answer 22

A much wider and deeper fold and thrust best than in subduction zones

Question 23

Fault blocks appear to rise up as mountains, but they are really sinking

Answer 23

Rift valleys

Rifting Mountains

Question 24

Can occur over a narrow or wide region

Answer 24

Rifting Mountains

Question 25

Allow valleys to sink along facing foot walls

Answer 25

Normal faults

Question 26

Ranges made from basin and range terrain

Answer 26

Horsts

Question 27

Basins made by basin and range terrain

Answer 27

Grabens

Question 28

One valley breaks through the crust forming a new ocean

Answer 28

Typical Rift

Question 29

Hundreds of valleys form but none break through the crust

Answer 29

Soft Rifting