DAVIDEK, K., LANDING, E., BOWRING, S. A., WESTROP, S. R., RUSHTON, A. W. A., FORTEY, R. A., ADRAIN, J. M. (1998) New uppermost Cambrian U–Pb date from Avalonian Wales and age of the Cambrian–Ordovician boundary. Geological Magazine, 135 (3) 303-309 doi:10.1017/s0016756898008711
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | New uppermost Cambrian U–Pb date from Avalonian Wales and age of the Cambrian–Ordovician boundary | ||
| Journal | Geological Magazine | ||
| Authors | DAVIDEK, K. | Author | |
| LANDING, E. | Author | ||
| BOWRING, S. A. | Author | ||
| WESTROP, S. R. | Author | ||
| RUSHTON, A. W. A. | Author | ||
| FORTEY, R. A. | Author | ||
| ADRAIN, J. M. | Author | ||
| Year | 1998 (May) | Volume | 135 |
| Issue | 3 | ||
| Publisher | Cambridge University Press (CUP) | ||
| DOI | doi:10.1017/s0016756898008711Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 257730 | Long-form Identifier | mindat:1:5:257730:6 |
| GUID | 0 | ||
| Full Reference | DAVIDEK, K., LANDING, E., BOWRING, S. A., WESTROP, S. R., RUSHTON, A. W. A., FORTEY, R. A., ADRAIN, J. M. (1998) New uppermost Cambrian U–Pb date from Avalonian Wales and age of the Cambrian–Ordovician boundary. Geological Magazine, 135 (3) 303-309 doi:10.1017/s0016756898008711 | ||
| Plain Text | DAVIDEK, K., LANDING, E., BOWRING, S. A., WESTROP, S. R., RUSHTON, A. W. A., FORTEY, R. A., ADRAIN, J. M. (1998) New uppermost Cambrian U–Pb date from Avalonian Wales and age of the Cambrian–Ordovician boundary. Geological Magazine, 135 (3) 303-309 doi:10.1017/s0016756898008711 | ||
| In | (1998, May) Geological Magazine Vol. 135 (3) Cambridge University Press (CUP) | ||
| Abstract/Notes | A crystal-rich volcaniclastic sandstone in the lower Peltura scarabaeoides Zone at Ogof-ddû near Criccieth, North Wales, yields a U–Pb zircon age of 491∓1 Ma. This late Late Cambrian date indicates a remarkably young age for the Cambrian–Ordovician boundary whose age must be less than 491 Ma. Hence the revised duration of the post-Placentian (trilobite-bearing) Cambrian indicates that local trilobite zonations allow a biostratigraphic resolution comparable to that provided by Ordovician graptolites and Mesozoic ammonites. | ||
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