For the more information about the air resources of the National
Park Service, please visit http://www.nature.nps.gov/air/.
Barringer Meteor Crater Barringer Meteor Crater is the largest
impact crater yet discovered in the United States. The impact
occurred approximately 50,000 years ago from a meteor weighing
several hundred thousand tons. Location: Coconino County, AZ
Year designated: 1967 For additional information see: 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