Quaternary geology of the German North Sea and Western Irish Sea Mud Belt: revised stratigraphies, geotechnical properties, sedimentology and anthropogenic impacts

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dc.contributor.advisor Wheeler, Andrew J. en
dc.contributor.advisor Mörz, Tobias en
dc.contributor.author Coughlan, Mark J. C.
dc.date.accessioned 2015-11-09T13:03:54Z
dc.date.issued 2015
dc.date.submitted 2015
dc.identifier.citation Coughlan, M. J. C. 2015. Quaternary geology of the German North Sea and Western Irish Sea Mud Belt: revised stratigraphies, geotechnical properties, sedimentology and anthropogenic impacts. PhD Thesis, University College Cork. en
dc.identifier.endpage 416
dc.identifier.uri http://hdl.handle.net/10468/2045
dc.description.abstract The climatic development of the Mid to Late Quaternary (last 400,000 years) is characterised by fluctuation between glacial and interglacial periods leading to the present interglacial, the Holocene. In comparison to preceding periods it was believed the Holocene represented a time of relative climatic stability. However, recent work has shown that the Holocene can be divided into cooler periods such as the Little Ice Age alternating with time intervals where climatic conditions ameliorated i.e. Medieval Warm Period, Holocene Thermal Optimum and the present Modern Optimum. In addition, the Holocene is recognised as a period with increasing anthropogenic influence on the environment. Onshore records recording glacial/interglacial cycles as well as anthropogenic effects are limited. However, sites of sediment accumulation on the shallow continental shelf offer the potential to reconstruct these events. Such sites include tunnel valleys and low energy, depositional settings. In this study we interrogated the sediment stratigraphy at such sites in the North Sea and Irish Sea using traditional techniques, as well as novel applications of geotechnical data, to reconstruct the palaeoenvironmental record. Within the German North Sea sector a combination of core, seismic and in-situ Cone Penetration Testing (CPT) data was used to identify sedimentary units, place them within a morphological context, relate them to glacial or interglacial periods stratigraphically, and correlate them across the German North Sea. Subsequently, we were able to revise the Mid to Late Quaternary stratigraphy for the North Sea using this new and novel data. Similarly, Holocene environmental changes were investigated within the Irish Sea at a depositional site with active anthropogenic influence. The methods used included analyses on grain-size distribution, foraminifera, gamma spectrometry, AMS 14C and physical core logging. The investigation revealed a strong fluctuating climatic signal early in the areas history before anthropogenic influence affects the record through trawling. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher University College Cork en
dc.rights © 2014, Mark J. C. Coughlan. en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/ en
dc.subject Irish Sea en
dc.subject Holocene en
dc.subject Geotechnics en
dc.subject Geophysics en
dc.subject Sedimentology en
dc.subject Anthropocene en
dc.subject Quaternary geology en
dc.subject Marine geology en
dc.title Quaternary geology of the German North Sea and Western Irish Sea Mud Belt: revised stratigraphies, geotechnical properties, sedimentology and anthropogenic impacts en
dc.type Doctoral thesis en
dc.type.qualificationlevel Doctoral en
dc.type.qualificationname PhD (Science) en
dc.internal.availability Full text available en
dc.description.version Accepted Version
dc.contributor.funder Geological Survey of Ireland en
dc.contributor.funder Marine Institute en
dc.contributor.funder Gaelectric Developments Ltd, Ireland en
dc.description.status Not peer reviewed en
dc.internal.school Biological, Earth & Environmental Sciences en
dc.check.reason Releasing this thesis would cause substantial prejudice to the commercial interests of the sponsor of the postgraduate research en
dc.check.opt-out Not applicable en
dc.thesis.opt-out false
dc.check.chapterOfThesis Chapter 3
dc.check.embargoformat Both hard copy thesis and e-thesis en
ucc.workflow.supervisor a.wheeler@ucc.ie
dc.internal.conferring Summer Conferring 2015


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© 2014, Mark J. C. Coughlan. Except where otherwise noted, this item's license is described as © 2014, Mark J. C. Coughlan.
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