at 65.0 or 65.5 million years ago—is more accurately dated to 66.0-66.1 Ma. See also Grenville Turner, inventor of the technique Berkeley Geochronology Center References External links WiscAr Geochronology Laboratory, University of Wisconsin-Madison UC Berkeley press release: "Precise dating of the destruction of Pompeii proves argon-argon method can reliably date rocks as young as 2,000 years" New Mexico Geochronology Research Laboratory Argon Isotope Facility of the Scottish Universities Environmental Research Council Open University Ar/Ar and Noble Gas Laboratory Argon Laboratory / Australian National University Radiometric dating Argon