Ausable Chasm, Sandstone canyon in Keeseville, New York.
The Ausable River flows through a two-mile-long gorge formed of 500-million-year-old Cambrian Potsdam Sandstone, reaching depths of 150 feet between towering rock walls.
The formation of this natural gorge began approximately 10,000 years ago through headward erosion caused by Rainbow Falls, following the retreat of the Laurentide ice sheet.
The area holds traces of Native American settlements, with historical records indicating conflicts between Mohawk and Algonquian tribes until their departure around 1810.
Visitors can access five miles of trails, participate in rock climbing, whitewater rafting, and via ferrata activities from May through October at the designated recreation center.
The canyon walls contain preserved trace fossils, ripple marks, and rare mid-Cambrian jellyfish fossils within the ancient tidal flat formations.
Location: New York
Website: https://ausablechasm.com
GPS coordinates: 44.52917,-73.46111
Latest update: May 27, 2025 10:03
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