Volcanic activity

This animation demonstrates different types of volcanic eruptions.

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Folding (intermediate)

Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.


It is a sedimentary rock with high calcium carbonate content.

Coal formation

This video presents the different stages of coal formation.


A fjord is a long, narrow inlet with steep sides, created in a valley carved by glacial activity.


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The World of the seas

Seas and oceans cover almost three-quarters of the Earth’s surface. 97.5% of the total...

How lakes disappear

On a geological time scale lakes are short-lived.

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