New uppermost Cambrian U-Pb date from Avalonina Wales and age of the Cambrian-Ordovician boundary

K.L. Davidek, E. Landing, S.A. Bowring, S.R. Westrop, A.W.A. Rushton, R.A. Fortey, and J.M. Adrain

1998

Article

Geological Magazine 135(3):305-309

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