Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-28T17:26:13.481Z Has data issue: false hasContentIssue false
  • English
  • Français

Discussion on an iridium anomaly in the Ludlow Bone Bed from the Upper Silurian, England

Published online by Cambridge University Press:  01 May 2009

R. D. A. Smith ,
R. B. Ainsworth  and
B. Schmitz
R. D. A. Smith
Affiliation:
Shell Research, KSEPL, Volmerlaan 6, 2288 GD Rijswijk, The Netherlands
R. B. Ainsworth
Affiliation:
Shell Research, KSEPL, Volmerlaan 6, 2288 GD Rijswijk, The Netherlands
B. Schmitz
Affiliation:
Department of Marine Geology, University of Göteborg, Box 7064, S-402 32 Göteborg, Sweden.
Get access Rights & Permissions [Opens in a new window]

Abstract

An abstract is not available for this content so a preview has been provided. Please use the Get access link above for information on how to access this content.
Image of the first page of this content. For PDF version, please use the ‘Save PDF’ preceeding this image.'
Type
Discussion
Information
Geological Magazine , Volume 130 , Issue 6 , November 1993 , pp. 855 - 856
Copyright
Copyright © Cambridge University Press 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Ainsworth, R. B. 1991. Discussion of palynofacies in a late Silurian regressive sequence in the Welsh Borderland and Wales. Journal of the Geological Society, London 148, 781–4.Google Scholar
Allen, J. R. L. 1974. Sedimentology of the Old Red Sandstone (Siluro-Devonian) in the Clee Hills area, Shropshire, England. Sedimentary Geology 12, 73–167.CrossRefGoogle Scholar
Allen, J. R. L. & Tarlo, L. B. 1963. The Downtonian and Dittonian Facies of the Welsh Borderland. Geological Magazine 100, 9–155.CrossRefGoogle Scholar
Montgomery, H., Pessagno, E., Soegaard, K. & Pessagno, J. 1992. Misconceptions concerning the Cretaceous/Tertiary boundary at the Brazos River, Falls County, Texas. Earth and Planetary Science Letters 109, 593–600.CrossRefGoogle Scholar
Nummedal, D. & Swift, D. P. 1987. Transgressive stratigraphy at sequence-bounding unconformities: some principles derived from Holocene and Cretaceous examples. In Sea-Level Fluctuation and Coastal Evolution (eds Nummedal, D., Pilkey, O. H. and Howard, J. D.), pp. 241–60. SEPM Special Publication No. 41.CrossRefGoogle Scholar
Playford, P. E., McLaren, D. J., Orth, C. J., Gilmore, J. S. & Goodfellow, W. D. 1984. Iridiumanomaly in the Upper Devonian of the Canning Basin, Western Australia. Science, 437–9.CrossRefGoogle ScholarPubMed
Plint, A. G. 1988. Sharp-based shoreface sequences and ‘offshore bars’ in the Cardium Formation of Alberta: their relationship to relativechanges in sea level. In Sea-level Changes-An Integrated Approach, pp. 357–70. SEPM Special Publication No. 42.CrossRefGoogle Scholar
Schmitz, B. 1988 a. Oceanic asteroidal impacts and the noble metal chemistry of sea water. EOS 69, 1254 (abstract).Google Scholar
Schmitz, B. 1988 b. Origin of microlayering in worldwide distributed Ir-richCretaceous-Tertiary boundary clays. Geology 16, 1068–1072.2.3.CO;2>CrossRefGoogle Scholar
Schmitz, B. 1992 a. An iridium anomaly in the Ludlow Bone Bed from the Upper Silurian, England. Geological Magazine 129, 359–62.CrossRefGoogle Scholar
Schmitz, B. 1992 b. Chalcophile elements and Ir in continental Cretaceous-Tertiary boundary clays from the western Interior of the USA. Geochimica et Cosmochima Acta 56, 1695–1703.CrossRefGoogle Scholar
Smith, R. D. A. & Ainsworth, R. B. 1989. Hummocky cross-stratification in the Downton of the Welsh Borderland. Journal of the Geological Society, London 146, 897–900.CrossRefGoogle Scholar
Wallace, M. W., Keays, R. R. & Gostin, V. A. 1991. Stromatolitic iron oxides: evidence that sea-level changes can cause sedimentary iridium anomalies. Geology 19, 551–4.2.3.CO;2>CrossRefGoogle Scholar
Zhou, L., Kyte, F. T. & Bohor, B. F. 1991. Cretaceous-Tertiary boundaryof DSDP Site 596, South Pacific. Geology 19, 694–7.2.3.CO;2>CrossRefGoogle Scholar