Chapter 6 – EarthquakesSection 1: Forces in Earth’s Crust

Types of Stress

Stress & plate boundaries

Types of Stress

What type of landform results from tension?valley

What type of landform results from compression?mountain

Silly PuttyStress

Silly PuttyWhich part of this activity models

the type of stress that would produce anticlines and synclines?

When we pushed the ends together – compression

Folding Earth’s Crust

Folding Earth’s Crust

Who can point out an anticline?Where is a syncline in this picture?

How can I tell the difference among the three types of faults?

Normal fault

Tension

Hanging wall moves down

Reverse fault

Compression

Hanging wall moves up

Strike-Slip fault

Shearing

Movement is side-to-side w/ very little up/down

Do hand models here.

Types of Faults What type of fault is

this?Normal faultWhat stress causes

this?tensionWhich wall moves –

the hanging wall or the footwall?

The hanging wallIn what direction?down.

Types of Faults

What type of fault is this?

reverse faultWhat stress causes

this?compressionWhich wall moves –

the hanging wall or the footwall?

The hanging wallIn what direction?Up and over the

footwall

Types of Faults

What type of fault is this?

Strike-slip faultWhat stress causes

this?shearingHow is this fault

different from the other two?

Rocks slip past each other with very little up/down movement.

Fault Block Mountains

Candy Bar Review