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Sinter terraces of the Weiße Lauter

 The riverbed of the Lenninger Lauter between Gutenberg and Brucken is covered by some meters of calcareous sinter. Along cascades, as here at the river Weiße Lauter, sinter terraces and sinter basins are formed. This karstform develops when lime is dissolved in rain water, enriched with carbon dioxide (CO2) from air and soil. When water moves and CO2 is leaking, part of the dissolved lime precipitates again, leading to the formation of calcareous sinter in the riverbed. Drivers of the sinter formation are water plants, which decarbonate the water CO2 during the process of photosynthesis. As a result, 150 Million year old Jurrassic limestone of the Swabian Alb now appears as fresh water lime. In historic times calcareous sinter was a popular construction stone. Due to its porous structure it was a very good, isolating cut stone, as it is seen at various buildings in the area.

The Sinter terraces are a Geopoint since April 2017.