LANDING, E., BOWRING, S. A., DAVIDEK, K. L., RUSHTON, A. W. A., FORTEY, R. A., WIMBLEDON, W. A. P. (2000) Cambrian–Ordovician boundary age and duration of the lowest Ordovician Tremadoc Series based on U–Pb zircon dates from Avalonian Wales. Geological Magazine, 137 (5) 485-494 doi:10.1017/s0016756800004507
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Cambrian–Ordovician boundary age and duration of the lowest Ordovician Tremadoc Series based on U–Pb zircon dates from Avalonian Wales | ||
| Journal | Geological Magazine | ||
| Authors | LANDING, E. | Author | |
| BOWRING, S. A. | Author | ||
| DAVIDEK, K. L. | Author | ||
| RUSHTON, A. W. A. | Author | ||
| FORTEY, R. A. | Author | ||
| WIMBLEDON, W. A. P. | Author | ||
| Year | 2000 (September) | Volume | 137 |
| Issue | 5 | ||
| Publisher | Cambridge University Press (CUP) | ||
| DOI | doi:10.1017/s0016756800004507Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 258503 | Long-form Identifier | mindat:1:5:258503:5 |
| GUID | 0 | ||
| Full Reference | LANDING, E., BOWRING, S. A., DAVIDEK, K. L., RUSHTON, A. W. A., FORTEY, R. A., WIMBLEDON, W. A. P. (2000) Cambrian–Ordovician boundary age and duration of the lowest Ordovician Tremadoc Series based on U–Pb zircon dates from Avalonian Wales. Geological Magazine, 137 (5) 485-494 doi:10.1017/s0016756800004507 | ||
| Plain Text | LANDING, E., BOWRING, S. A., DAVIDEK, K. L., RUSHTON, A. W. A., FORTEY, R. A., WIMBLEDON, W. A. P. (2000) Cambrian–Ordovician boundary age and duration of the lowest Ordovician Tremadoc Series based on U–Pb zircon dates from Avalonian Wales. Geological Magazine, 137 (5) 485-494 doi:10.1017/s0016756800004507 | ||
| In | (2000, September) Geological Magazine Vol. 137 (5) Cambridge University Press (CUP) | ||
| Abstract/Notes | Two thin volcaniclastic sandstone beds in the Bryn-llin-fawr road section in North Wales overlie an apparent sequence boundary within the uppermost Cambrian Acerocare Zone and are overlain by lowest Ordovician (lower Tremadoc) Rhabdinopora faunas. U–Pb geochronology of zircons from these sandstones yields a maximum Cambrian–Ordovician boundary age of 489±0.6 Ma. This age indicates both that the Tremadoc Series (lowest Ordovician) may be shorter in duration than was previously thought and that the duration of the Middle and Late Cambrian (c. 22 Ma) was much less than that of the Early Cambrian (c. 33 Ma). Cambrian trilobite zones locally had an average duration as short as 1 Ma. | ||
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