chapter 6 – earthquakes section 1: forces in earth’s crust
TRANSCRIPT
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
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