Käsrinne bei Heidenheim, Tuff stream formation in Heidenheim, Germany
Käsrinne is a tuff channel that stretches roughly 150 meters down the western slope of Gelber Berg. Water flows through this natural groove and deposits calcium-rich minerals over time, creating visible basins and terraces along its course.
The channel formed over thousands of years as mineral-rich spring water carved through the slope. Its name comes from the milky appearance that observers noticed in the water long ago.
This geological site stands as the longest stone stream in the Franconian Jura, attracting researchers studying natural limestone formations.
The spring hiking trail from Heidenheim offers the best way to reach this formation. The path goes past Gelber Berg and provides access to the site year-round in various weather conditions.
Two small springs merge above the formation and continuously feed it with mineral-rich water. This steady flow allows the ongoing buildup of the distinctive calcium deposits that make the channel visible.
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