• Isotope geochronology of the Eidfjord Granite, Hardangervidda, West Norway. 

      Priem, Harry N.A.; Verschure, R.H.; Verdurmen, E.A.Th.; Hebeda, E.H.; Boelrijk, N.A.I.M. (NGU (327), Journal article, 1976)
      The Eidfjord Granite has a 7-point whole-rock Rb-Sr isochron age of 931 +- 35 Ma with initual 87Sr\/86Sr = 0.7058 +- 0.0028 (50.0 X (10)9 year 87Rb half life; errors at 95 per cent confidence level). Two separated biotites ...
    • Rb-Sr isochron age of Caledonian acid volcanics at Stord, western Norway. 

      Torske, Tore; Priem, Harry N.A. (NGU (300), Journal article, 1973)
      An eight-point Rb-Sr whole-rock isochron from Caledonianrhyolites at Stord in western Norway defines an age of 455 +- 5 m.y.and an initial 87Sr\/86Sr of 0.7071 +- 0.00018. This places thevolcanism in the Upper Ordivicium, ...