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North Menan Butte
North Menan Butte contains outstanding examples of glass tuff cones, which are found in only a few places in the world. Its large size and unusual composition make it particularly illustrative of an unusual aspect of basaltic volcanism.
Year designated: 1980
Ownership: Federal, Private
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