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Rolling stones ...
This broken erratic boulder near Nijemirdum in Gaasterlân-Sleat is part of the local boulder route. The various sorts of erratic boulders which can be found in Friesland were brought to the North of the Netherlands around 100,000 years ago by a 250 metre-thick ice mass from Southern Sweden. The municipality of Gaasterlân-Sleat is located on a lateral moraine which is 10 metres high in places and which consists of boulder clay, formed by a glacier. Koudum is also located on a similar ground moraine embankment. In between these ‘gaasten’, that is the boulder clay backs on both sides of the glacier, is the glacial valley. The rise in sea level and the washing away of peat deposits led to the area being flooded to form the Morra and the Fluessen.
www.marenklif.nl
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From Sweden
