{Chapter 3

Par 3: Rivers of ice

Glacier: An ice field that is moving very slowly down a mountain

Greenland; Elephant foot glacier Argentina; glacial terminus

Aletsch Glacier Switzerland, largest glacier of the Alps

Glacial tunnel

Firn basin

Lateral moraine

Debris

From the firn basin, a glacier is slowly moving down the mountain. Erosion is causing moraine and debris

Firn formation: a fluffy snowflake turns into firn caused by - melting and freezing over and over again- pressure of new layers of snow, so old layers are pressed together

Ice age or glacial: a period when the summer temperature is below 10˚CNowadays we are in an interglacial period

Summer temperature 10˚C

Lake Garda: an example of a lake caused by a glacier

Geirangerfjord, Norway: a U-valley caused by a glacier which is filled with seawater

Fjord coast: Norway aerial photo and map