Warke, P. A., Curran, J. M., Smith, B., Gardiner, M. F. and Foley, C. (2010). Post-excavation deterioration of the Copney Bronze Age Stone Circle Complex. Geoarchaeology 25 (5). Vol 25(5), pp. 541-571. https://doi.org/10.1002/gea.20324.

Title
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Title:		 Post-excavation deterioration of the Copney Bronze Age Stone Circle Complex
Subtitle
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Subtitle:		 a geomorphological perspective
Issue
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Issue:		 Geoarchaeology 25 (5)
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Series:		 Geoarchaeology
Volume
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Volume:		 25 (5)
Number of Pages
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Number of Pages:		 143
Page Start/End
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Page Start/End:		 541 - 571
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Publication Type
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Publication Type:		 Journal
Abstract
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Abstract:		 Post-excavation deterioration of stones from under blanket peat at the Copney Bronze Age Stone Circle Complex in County Tyrone, Northern Ireland, proceeded through widespread scaling, flaking, and splitting of stones. Investigation showed that prior to burial the porphyritic stones already possessed a complex legacy of geological weaknesses derived from hydrothermal alteration and tectonic deformation. Analysis indicated that significant alteration occurred during approximately 2000 years of burial under acidic peat cover, with development of a secondary porosity, alteration of primary minerals, and the opening of preexisting lines of weakness within the stones. Burial under peat also resulted in 'bleaching' the stones so that they appeared white in color following excavation. These alterations during burial left the stones in a significantly weakened state and particularly susceptible to the effects of subaerial weathering processes. Data underline the potential fragility of excavated stonework and highlight the need to plan for its aftercare before complete excavation is undertaken.
Author
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Author:		 Patricia A Warke
Joanne M Curran
Bernard J Smith
Mark F Gardiner ORCID icon
Claire Foley
Year of Publication
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Year of Publication:		 2010
Locations
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Subjects / Periods:
Stones Burial (Auto Detected Subject)
Porphyritic Stones (Auto Detected Subject)
Bronze Age (Auto Detected Temporal)
FUNERARY SITE (Monument Type England)
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DOI: https://doi.org/10.1002/gea.20324
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Created Date:		 13 Feb 2011