Ch 2.1-2.2 Vocab

Front

A deeply buried rock is pushed down by the weight of the material above it, preventing movement.

Back

Confining Stress

Front

Pressure that squeezes rocks together, causing folding or fracturing.

Back

Compression

Front

Rocks pulled apart, causing lengthening or breaking.

Back

Tension

Front

Stress from parallel forces moving in opposite directions.

Back

Shear

Front

Stress causes material shape change.

Back

Strain/Deformation

Front

Increasing stress causes rock to return to original shape when stress is removed.

Back

Elastic Deformation

Front

Stress causes rock to not return to original shape when removed.

Back

Plastic Deformation

Front

When stress increases, the rock breaks.

Back

Fracture

Front

A rock under stress fractures without movement on either side.

Back

Joint

Front

Stresses along _____ cause rocks to break and move suddenly, releasing energy as an earthquake.

Back

Faults