Bletterbach, Mountain brook in Aldein, Italy
The Bletterbach is a gorge that cuts through the Dolomites for approximately 8 kilometers, with depths reaching around 400 meters and walls that narrow from about 300 meters wide at the top to roughly 30 meters at the base. The limestone and dolomitic rock layers are visible throughout the entire passage and tell the story of ancient seas and volcanic activity.
The gorge began forming approximately 250 million years ago and its rock layers span from the Upper Permian to the Middle Triassic period. Volcanic deposits preserved at the base of the canyon provide evidence of the intense geological activity that shaped the region.
The canyon serves as an outdoor classroom where the valley's geological story is told through the rocks themselves. Locals and visitors alike use the trails to understand how the landscape has changed over deep time.
The gorge is accessible by marked hiking trails equipped with 16 information boards explaining the geological features and natural formations. Wear sturdy footwear and allow time to follow the paths at a comfortable pace while reading the interpretive signs.
The canyon preserves an exceptional collection of fossils from the Permian era, including remains of reptiles, amphibians, ammonites, and ancient plants from tropical settings. These well-preserved specimens offer visitors a direct window into life from hundreds of millions of years ago.
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