Crustal Deformation

What type of structure is shown in this photograph?

• anticline

• monocline

• syncline

• reverse fault

For the fault indicated in the figure, which side is the hanging wall?

• Neither A nor B is the hanging wall.

• Both A and B are hanging walls.

• A is the hanging wall.

• B is the hanging wall.

What type of stress formed the structure shown in this figure?

• compression

• tension

• confining pressure

• fluid pressure

Tags

NGSS.MS-ESS2-2

How does a monocline form?

• A monocline forms due to tensile stresses when rocks are beginning to flow.

• A monocline forms when sedimentary rocks drape above a fault.

• A monocline forms under compressional stresses when rocks are just beginning to fold.

• A monocline forms as the connection between a syncline and an anticline.

What type of structure is shown in this photograph?

• Ayncline

• Reverse fault

• Normal fault

• Joint

Tags

NGSS.HS-ESS1-5

What type of a structure is shown in this figure?

• Plunging anticline

• Normal fault

• Plunging syncline

• syncline

What is the difference between “joints” and “faults” in rocks?

• Faults form first but if the deformation continues, then joints will begin to form in the rock to show that the rock unit is about to break apart entirely.

• Joints are fractures that form due to brittle expansion or stretching of rocks, while faults are fractures where the rocks on one side have moved relative to the other side due to many different types of stresses.

• Faults are fractures that form due to brittle expansion or stretching of rocks, while joints are fractures where the rocks on one side have moved relative to the other side due to many different types of stresses.

• The terms describe the same thing.

What are the three main types of stress?

• positive, negative, and neutral

• convergence, divergence, and transform faulting

• confining stress, deformation, and folding

• compression, tension, and shear

How is brittle deformation different from ductile deformation?

• Brittle deformation produces joints and faults, while ductile deformation produces folds.

• Brittle deformation always precedes ductile deformation as the stress on the rocks increases.

• Brittle deformation can only occur in the shallow crust, while ductile deformation can only occur in the deep crust.

• Brittle deformation requires high temperatures but low pressure, while ductile deformation requires both high temperatures and high pressures.

Folds are most often created through what type of stress?

• tension

• confining pressure

• shear

• compression