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Geology

From far away, the stones at the Lech river all look the same. Grey and more or less polished thanks to the water. But that’s wrong! 

If you take the time to examine the gravel nearby, you will notice that other colours are also found on the gravel bank. Green, red, rose, white, round or chiselled. Each stone tells the story of its formation.

Gravel, stones, debris, sand – all together are  referred to as bed load. Not without reason. With the water, the Tiroler Lech river transports a great number of stones into the valley. If one would stop the bedload transport, the Lech river would carve a deeper hollow, the gravel banks would disappear and the Lech would be a straight river into the valley. The gravel stones are an important lifeline of the Lech river.

The Lech river has stones in abundance. Its feeder rivers continuously transport stones from the mountains. Along  its way the material is crushed and smoothened. The stones are deposited and create gravel banks. During  times of flooding they are washed away, crushed further, and polished. New gravel comes from the mountains constantly  and is transported through the Lech.

The colourful Lech gravel indicates a lot! Different colours and forms depict  their formation.

Children of the Sea What mountains are made of Types or Rock More about the rock types Rock Strata More about the rock strata

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