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Natural Monument - Traces of the Ice Age - Erosion forms

Glacial striation marks
Erosion forms Bild 116

Debris in the slow moving basal ice scraped along the bed for thousands of years, polishing and gouging the underlying rock. Glacial polish is typcial for the up-glacier side of rocks shaped in this way, called 'roches moutonnée'. The parallel grooves or glacial striation marks running from south to north (i.e. from right to left in this photo) indicate the direction of the glacier, which was moving at a speed of several centimetres a day.