... numerical age for interbedded freshwater fish fauna of the Taggerty Formation and, together with its recently revised Givetian age based on independent faunal correlations, provide a new calibration point on the Devonian time scale. The use of Pb + /UO 2 + rather than Pb + /U + in secondary ionization mass...

...). Cerberean Cauldron volcanics Located stratigraphically between the Cerberean Volcanics and the underlying Snobs Creek Volcanics is the Blue Range Formation in which, at Taggerty, Hills (1929, 1931) first recorded a fauna of non-marine fish of late Devonian age. McDougall et al. (1966) con- cluded from...