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• NACDA: Search Holdings

  Offsite —

• Ages from the National Geochronological Database

  Offsite — A subset of the National Geochronological Database as of 1995. Shows the distribution of published K/Ar and Ar/Ar age determinations in the US. Sample location, rock description, analytical data, age, interpretation, and bibliographic reference are given. Additional facts from data.gov Dataset Summary Date Released: 1995 Date Updated: 1995 Time Period: data obtained ...