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New palynological data from the Leinster Lower Palaeozoic massif, southeastern Ireland

Published online by Cambridge University Press:  03 November 2011

Peter M. Brück ,
Kenneth T. Higgs ,
Nadia Maziane-Serraj  and
Michel Vanguestaine
Peter M. Brück
Affiliation:
Peter M. Brück, Kenneth T. Higgs and Nadia Maziane-Serraj, Department of Geology,University College Cork, Ireland.
Kenneth T. Higgs
Affiliation:
Peter M. Brück, Kenneth T. Higgs and Nadia Maziane-Serraj, Department of Geology,University College Cork, Ireland.
Nadia Maziane-Serraj
Affiliation:
Peter M. Brück, Kenneth T. Higgs and Nadia Maziane-Serraj, Department of Geology,University College Cork, Ireland.
Michel Vanguestaine
Affiliation:
Michel Vanguestaine, Services associés de Paleontologie, Université de Liège, Liège, Belgium.
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Abstract

ABSTRACT

In southeastern Ireland, the tectonic evolution of the northwestern Avalonian margin is rather poorly understood and only partially constrained. This is because the stratigraphy comprises in the main unfossiliferous turbidites. Nevertheless, some authors have attempted to define ‘terranes’ and ‘tracts’ in the region, aided by several significant Caledonoid-trending structural breaks that can be determined in the field. Palynological work was carried out in the early 1970s and established a range of ages from approximately mid Cambrian to late Silurian, although much of the succession proved barren. In the current study, the Lower Palaeozoic sequences W of the Leinster Granite and in the Slievenamon Inlier to the S have been palynologically re-investigated. Previous work proposed an unbroken succession from lower Ordovician Ribband Group turbidites and volcanics younging westwards conformably into upper Silurian Kilcullen Group sediments. The new study clearly shows that the Ordovician palynomorphs in the older part of the Kilcullen Group are reworked. In fact, there exists a major stratigraphical break between the Ribband Group dated as early Ordovician, Arenig, and the Kilcullen Group which is entirely Silurian, late Llandovery to early Wenlock in age. This major break has a minimum strike length of 150 km and is most likely much longer, extending some hundreds of kilometres SW to Dingle and possibly equating with a similar discontinuity in the Isle of Man to the NE. This break would thus appear to be a major feature within the succession of the northwestern Avalonian margin.

Keywords

AcritarchsbiostratigraphyOrdovicianSilurian.
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 91 , Issue 3-4: The Southern Uplands Terrane: Tectonics and Biostratigraphy within the Caledonian Orogen , 2000 , pp. 509 - 514
Copyright
Copyright © Royal Society of Edinburgh 2000

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References

Brück, P. M. 1971. Fossils content and age of the greywacke formations west of the Leinster Granite in Counties Dublin, Kildare and Wicklow, Ireland. Geological Magazine 108, 303–10.CrossRefGoogle Scholar
Brück, P. M. 1972. Stratigraphy and sedimentology of the Lower Palaeozoic greywacke formations in Counties Kildare and West Wicklow. Proceedings of the Royal Irish Academy 72, 25–53.Google Scholar
Brück, P. M. 1973. Structure of the Lower Palaeozoic greywacke formations west of the Leinster Granite in Counties Kildare and West Wicklow. Scientific Proceedings of the Royal Dublin Society 4A, 391–409.Google Scholar
Brück, P. M., Potter, T. L. & Downie, C. 1974. The Lower Palaeozoic stratigraphy of the northern part of the Leinster Massif. Proceedings of the Royal Irish Academy 74B, 75–84.Google Scholar
Brück, P. M., Colthurst, J. R. J., Feely, M., Gardiner, , Penney, S. R.Reeves, T. J., Shannon, P. M., Smith, D. G. & Vanguestaine, M. 1979. Southeast Ireland: Lower Palaeozoic stratigraphy and depositional history. In Harris, A. L., Holland, C.H. & Leake, B. E. (eds) The Caledonides of the British Isles – Reviewed, Geological Society, London, Special Publication 8, 533–44. London: Geological Society.Google Scholar
Brück, P. M. & Downie, C. 1974. Silurian microfossils from west of the Leinster Granite. Journal of the Geological Society, London 130, 383–6.CrossRefGoogle Scholar
Brück, P. M. & Stillman, C. J. 1978. In Field Guide to the Caledonian and Pre-Caledonian Rocks of Southeast Ireland, Geological Survey of Ireland Guide Series 2, 5–14.Google Scholar
Bultynck, P. & Martin, F. 1982. Conodontes et acritarches de l'Ordovicien inférieur et acritarches du Silurien inférieur de la partie septen-trionale de la Cordillere Argentine. Bulletin de l'Institut royal des Sciences naturelles de Belgique 53, 1–21.Google Scholar
Colthurst, J. R. J. & Smith, D. G. 1977. Palaeontological evidence for the age of the Lower Palaeozoic rocks of the Slievenamon Inlier, County Tipperary. Proceedings of the Royal Irish Academy 77B, 143–58.Google Scholar
Cramer, F. H. 1970. Distribution of selected acritarchs. Revista Española de Micropaleontologia, numero extraordinario.Google Scholar
Emo, G. T. & Smith, D. G. 1978. Palynological evidence for the age of the Lower Palaeozoic rocks of Slieve Aughty, Counties Clare and Galway. Proceedings of the Royal Irish Academy 78, 281–92.Google Scholar
Gallagher, V., O'Connor, P.J. & Aflation, M. 1994. Intra-Ordovician deformation in south-east Ireland: evidence from the geological setting, geochemical affinities and U-Pb zircon age of the Croghan Kinshelagh granite. Geological Magazine 131, 668–84.CrossRefGoogle Scholar
Gardiner, P. R. R. & Vanguestaine, M. 1971. Cambrian and Ordovician Microfossils from, G, south-east Ireland and their implications. Geological Survey of Ireland Bulletin 1, 163–210.Google Scholar
Kiryanov, V. V. 1978. Silurian acritarchs from Voloyno-Podolia. Akademii Nauk, Ukrainskoi, SSR, Institute Geology Nauk Kiev, Naukova Dumka for 1978, 1–116.Google Scholar
Le, Hérissé A. 1989. Acritarchs et kystes d'algues Prasinophycées du Silurian de Gotland, Suède. Palaeontogeographica Italica 76, 57–302.Google Scholar
Le, Hérissé A. & Gourvennec, R. 1995. Biogeography of Upper Llandovery and Wenlock acritarchs. Review of Palaeobotany and Palynology 56, 69–87.Google Scholar
Martin, F. 1969. Les acritarches de l'Ordovicien et du Silurien belges. Détermination et valeur stratigraphiques. Mémoire de l'Institut royal des Sciences naturelles de Belgique, 160, 1–175.Google Scholar
Martin, F. 1973. Ordovicien supérieur et Silurien inférieur à Deerlijk (Belgique); palynofacies et microfaciès. Mémoire de l'Institut royal des Sciences naturalles de Belgique 174, 1–77.Google Scholar
Max, M. D.Barber, A. J. & Martinez, J. 1990. Terrane assemblage of the Leinster Massif, S.E., Ireland, during the Lower Palaeozoic. Journal of the Geological Society, London 147, 1035–50.CrossRefGoogle Scholar
McConnell, B. & Philcox, M. E. 1994. Geology of Kildare-Wicklow, a geological description to accompany the Bedrock Geology 1:100,000 Map Series, Sheet 16, Kildare-Wicklow. Dublin: Geological Survey of Ireland.Google Scholar
McConnell, B. J., Morris, J. H. & Kennan, P.S. 1999. A comparison of the Ribband Group (southeastern Ireland) to The Manx Group (Isle of Man) and Skiddaw Group (northeastern England). In Woodcock, N. H., Quirk, D. G., Fitches, W. R. & Barnes, R. P. (eds) In Sight of the Suture: the Palaeozoic geology of the Isle of Man in its Iapetus Ocean context, Geological Society, London, Special Publication 160, 337–43. London: Geological Society.Google Scholar
MoczydВowska, M. & Crimes, T. P. 1995. Late Cambrian acritarchs and their age constraints on an Ediacaran-type fauna from the Booley Bay Formation, Co. Wexford, Eire. Geological Journal 30, 111–28.CrossRefGoogle Scholar
Molyneux, S. G., Le, Hérissé A. & Wicander, R. 1996. Paleozoic phytoplankton. In Jansonius, J. & McGregor, D. C. (eds) Palynology: principles and applications. American Association of Stratigraphic Palynologists Foundation 2, 493–529.Google Scholar
Molyneux, S. G. & Leader, R. U. 1997. Morphological variation in Coryphydium from the Arenigian Series (Lower Ordovician) of northwestern England. Review of Palaeobotany and Palynology 98, 81–94.CrossRefGoogle Scholar
Morris, J. H., Woodcock, N. H. & Howe, M. P. A. 1999. The Silurian sedimentation on the Isle of Man: the late Wenlock Niarby Formation, Dalby Group. In Woodcock, N. H., Quirk, D. G., Fitches, W. R. & Barnes, R. P. (eds) In Sight of the Suture: the Palaeozoic geology of the Isle of Man in its Iapetus Ocean context, Geological Society, London, Special Publication 160, 189–211. London: Geological Society.Google Scholar
Murphy, F. C., Anderson, T. B., Daly, J. S., Gallagher, V., Graham, J. R., Harper, D. A. T., Johnson, J. D., Kennan, P. S., Kennedy, M. J., Long, C. B., Morris, J. H., O'Keeffe, W. G., Parkes, M., Ryan, P. D., Sloan, R. J., Stillman, C. J., Tietzsch-Tyler, D., Tood, S. P. & Wrafter, J. P. 1991. An appraisal of Caledonian suspect terranes in Ireland. Irish Journal of Earth Science 11, 11–41.Google Scholar
Pöthé de Baldis, E. D. 1974. Microplancton del Silurico superior de Santiago del Estero Republica Argentina. Ameghiniana 11, 313–27.Google Scholar
Pöthé de Baldis, E. D. 1975. Microplancton de la Formacion Los Espejos, Provincia de San Juan, Republica Argentina. Revista Española de Micropaleontologia 7, 507–18.Google Scholar
Richardson, J. B. & Rasul, S. M. 1990. Palynofacies in Late Silurian regressive sequence in the Welsh Borderland and Wales. Journal of the Geological Society, London 147, 675–86.CrossRefGoogle Scholar
Szaniawski, H. 1996. Scolecodonts. In Jansonius, J. & McGregor, D. C. (eds) Palynology: principles and applications. American Association of Stratigraphic Palynologists Foundation 1, 337–54.Google Scholar
Thusu, B. 1973. Acritarchs of the middle Silurian Rochester Formation of Southern Ontario. Palaeontology 16, 799–826.Google Scholar
Tietzsch-Tyler, D. & Sleeman, A. G. 1994. Geology of South Wexford, a geological description of the South Wexford and adjoining parts of Waterford, Kilkenny and Carlow to accompany the Bedrock Geology 1:100,000 Map Series, Sheet 13, South Wexford. Dublin: Geological Survey of Ireland.Google Scholar
Todd, S. P., Connery, C., Higgs, K. T., & Murphy, F. C. 2000. An early Ordovician age for the Annascaul Formation of the SE Dingle Peninsula, SW Ireland. Journal of the Geological Society, London 157, 823–33.Google Scholar
Van, Staal C. R., Dewey, J. F., Mac Niocail, C. & McKerrow, W.S. 1998. The Cambrian-Silurian tectonic evolution of the northern Appalachians and British Caledonides: history of a complex, west and southwest Pacific-type segment of Iapetus. In Blundell, D. J. & Scott, A. C. (eds) Lyell: The Past is the Key to the Present, Geological Society, London, Special Publication 143, 199–242. London: Geological Society.Google Scholar