Ausable Chasm is a sandstone gorge tourist attraction near Keeseville, New York. The Ausable River runs through it, which then empties into Lake Champlain.
The gorge is about two miles long, and is a minor tourist attraction in the Adirondacks region of Upstate New York. It is fed by the Rainbow Falls at its southern extreme.
The chasm has a continuous exposure of a section of the Potsdam Sandstone more than 160 metres (520 ft) thick, which includes, in an unpublished location, a rare, mid-Cambrian jellyfish fossil.
- Pictures from 1907 postcards
- ^ James W. Hagadorn and Edward S. Belt (2008), Stranded in Upstate New York: Cambrian Scyphomedusae from the Potsdam Sandstone, Palaios, v. 23, p. 424–441, doi:10.2110/palo.2006.p06-104r
Coordinates: 44°31′45″N 73°27′40″W / 44.52917°N 73.46111°W