1. Folding

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1. Folding

Aim: What are some results from stress within the

continental crust?

I. Stress ­ the amount of force per unit that is placed on

a given material.

A. Three types of stress:

1. compression – rocks are squeezed together

2. tension – force that pulls rocks apart

3. shearing – pushes rocks in opposite horizontal

directions.


What types of plate boundaries are associated with:

Shearing?

Compression?

Tension?


B. Results of Stress

1. Folding – the process of squeezing rocks into folds.

Ex: Himalayas, Alps, Rockies formed from folding.

a. Anticlines – upfolds

b. Synclines ­ downfolds

Anticline

Syncline


Folds


2. Faulting – a crack in the earth’s surface along which

movement has occurred. Faulting often takes place along

boundaries between crustal plates. Movements of these

plates at their boundaries cause faulting.


Fault

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