BERGSTRÖM, STIG M., HUFF, WARREN D., KOLATA, DENNIS R. (1998) The Lower Silurian Osmundsberg K-bentonite. Part I: stratigraphic position, distribution, and palaeogeographic significance. Geological Magazine, 135 (1) 1-13 doi:10.1017/s0016756897007887
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | The Lower Silurian Osmundsberg K-bentonite. Part I: stratigraphic position, distribution, and palaeogeographic significance | ||
| Journal | Geological Magazine | ||
| Authors | BERGSTRÖM, STIG M. | Author | |
| HUFF, WARREN D. | Author | ||
| KOLATA, DENNIS R. | Author | ||
| Year | 1998 (January) | Volume | 135 |
| Issue | 1 | ||
| Publisher | Cambridge University Press (CUP) | ||
| DOI | doi:10.1017/s0016756897007887Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 257560 | Long-form Identifier | mindat:1:5:257560:9 |
| GUID | 0 | ||
| Full Reference | BERGSTRÖM, STIG M., HUFF, WARREN D., KOLATA, DENNIS R. (1998) The Lower Silurian Osmundsberg K-bentonite. Part I: stratigraphic position, distribution, and palaeogeographic significance. Geological Magazine, 135 (1) 1-13 doi:10.1017/s0016756897007887 | ||
| Plain Text | BERGSTRÖM, STIG M., HUFF, WARREN D., KOLATA, DENNIS R. (1998) The Lower Silurian Osmundsberg K-bentonite. Part I: stratigraphic position, distribution, and palaeogeographic significance. Geological Magazine, 135 (1) 1-13 doi:10.1017/s0016756897007887 | ||
| In | (1998, January) Geological Magazine Vol. 135 (1) Cambridge University Press (CUP) | ||
| Abstract/Notes | A large number of Lower Silurian (Llandovery) K-bentonite beds have been recorded from northwestern Europe, particularly in Baltoscandia and the British Isles, but previous attempts to trace single beds regionally have yielded inconclusive results. The present study suggests that based on its unusual thickness, stratigraphic position and trace element geochemistry, one Telychian ash bed, the Osmundsberg K-bentonite, can be recognized at many localities in Estonia, Sweden and Norway and probably also in Scotland and Northern Ireland. This bed, which is up to 115 cm thick, is in the lower–middle turriculatus Zone. The stratigraphic position, thickness variation and geographic distribution of the Osmundsberg K-bentonite are illustrated by means of 12 selected Llandovery successions in Sweden, Estonia, Norway, Denmark, Scotland and Northern Ireland. In Baltoscandia, the Osmundsberg K-bentonite shows a trend of general thickness increase in a western direction suggesting that its source area was located in the northern Iapetus region between Baltica and Laurentia. Because large-magnitude ash falls like the one that produced the Osmundsberg K-bentonite last at most a few weeks, such an ash bed may be used as a unique time-plane for a variety of regional geological and palaeontological studies. | ||
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