For the more information about the air resources of the National Park Service, please visit http://www.nature.nps.gov/air/.
Greenwood Canyon, located along a tributary of the Braden Branch, is a rich source of early Cretaceous mammalian fossils. The site has produced specimans of several new taxa.
Location: Montague County, TX
Year designated: 1975
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