For the more information about the air resources of the National Park Service, please visit http://www.nature.nps.gov/air/.
Moss Island is part of an uplifted fault block of ancient crystalline rock. It contains the best exposure of glacial age potholes eroded by meltwater floods in the eastern United States.
Location: Herkimer County, NY
Year designated: 1976
Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012