Browsing by Author "Ebert J.R."

Browsing by Author "Ebert J.R."

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  • NEW U-PB ZIRCON AGES AND THE DURATION AND DIVISION OF DEVONIAN TIME 
    Tucker R.D.; Bradley D.C.; Ver Straeten C.A.; Harris A.G.; Ebert J.R.; McCutcheon S.R. (1998)
    Newly determined U–Pb zircon ages of volcanic ashes closely tied to biostratigraphic zones are used to revise the Devonian time-scale. They are: (1) 417.6±1.0 Ma for an ash within the conodont zone of Icrioduswoschmidti/I. ...