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14C Dating Mortar in Ireland

Published online by Cambridge University Press:  18 July 2016

Rainer Berger
Rainer Berger*
Affiliation:
Interdisciplinary Archaeology Graduate Program, Departments of Anthropology and Geography Institute of Geophysics and Planetary Physics, University of California, Los Angeles 90024 USA
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Abstract

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I have developed a method of dating early medieval Irish buildings using charcoal encased in mortar. Due to the inclement weather over centuries, timbers do not preserve well in these structures, leaving little suitable material for 14C dating. Initially, several buildings of known age were analyzed to verify the mortar charcoal technique. Then, a series of buildings for which no definite architectural-historical dates existed, e.g., churches, houses, oratories and round towers, was successfully tested. I discuss here the results of this dating approach, and provide architectural historians with a firmer understanding of the origin and antiquity of early Irish buildings.

Information

Type
V. Archaeological Applications
Information
Radiocarbon , Volume 34 , Issue 3: Proceedings of the 14th International Radiocarbon Conference , 1992, pp. 880 - 889
Copyright
Copyright © The American Journal of Science 

References

Baxter, M. S. and Walton, A. 1970a Glasgow University radiocarbon measurements III. Radiocarbon 12(2): 496–502.Google Scholar
Baxter, M. S. and Walton, A. 1970b Radiocarbon dating of mortars. Nature 225: 937–938.Google Scholar
Berger, R. 1970 Scientific Methods in Medieval Archaeology. Berkeley, Los Angeles, University of California Press: 89–139.Google Scholar
Berger, R. 1990 Early medieval Irish buildings: Radiocarbon dating of mortar. In Mook, W. G. and Waterbolk, H. T., eds., Proceedings of the Second International Symposium 14C and Archaeology. Groningen, PACT 29: 415–422.Google Scholar
Delibrias, G., Guillier, M. T. and Labeyrie, J. 1964 Saclay natural radiocarbon measurements I. Radiocarbon 6: 233–250.Google Scholar
Folk, R. and Valastro, S. Jr. 1979 Dating of lime mortar by 14C. In Berger, R. and Suess, H. E., eds., Radiocarbon Dating. Proceedings of the 9th International 14C Conference. Berkeley, University of California Press: 721–732.Google Scholar
Harbison, P. 1982 Guide to the National Monuments in the Republic of Ireland. Dublin, Gill and Macmillan: 284 p.Google Scholar
Horn, W., Marshall, J.-W. and Rourke, G. D. 1990 The Forgotten Hermitage of Skellig Michael. Berkeley, University of California Press: 111 p.Google Scholar
Kedar, B. Z. and Mook, W. G. 1978 Radiocarbon dating of mortar from the city-wall of Askalon. Israel Exploration Journal 28: 173–176.Google Scholar
Killanin, Lord, Duigan, M. V. and Harbison, P. 1989 The Shell Guide to Ireland. Dublin, Gill and Macmillan: 340 p.Google Scholar
Lavelle, D. E. S. 1976 Skellig, Island Outposts of Europe. Dublin, O'Brien Press.Google Scholar
Leask, H. G. 1987 Irish Churches and Monastic Buildings I, The First Phases and the Romanesque. Dundalk, Dunalgan Press: 173 p.Google Scholar
Marshall, J.-W. (ms.) 1989 The spread of mainland paruchia to the Atlantic islands of Illauntannig, High Island and Inishmurray. Ph.D. dissertation, University of California, Los Angeles.Google Scholar
Pearson, G. W., Pilcher, J. R., Baillie, M. G. L., Corbett, D. M. and Qua, F. 1986 High-precision 14C measurements of Irish oaks to show the natural 14C variations from AD 1840–5210 bc. In Stuiver, M. and Kra, R. S., eds., Proceedings of the 12th International 14C Conference. Radiocarbon 28(2B): 911–934.Google Scholar
Stuiver, M. and Pearson, G. W. 1986 High-precision calibration of the radiocarbon time scale AD 1950–500 bc. In Stuiver, M. and Kra, R. S., eds., Proceedings of the 12th International 14C Conference. Radiocarbon 28(2B): 805–838.Google Scholar
Stuiver, M., Pearson, G. W. and Braziunas, T. F. 1986 Radiocarbon age calibration of marine samples back to 9000 cal yr bp. In Stuiver, M. and Kra, R. S., eds., Proceedings of the 12th International 14C Conference. Radiocarbon 28(2B): 980–1021.Google Scholar
Stuiver, M. and Smith, C. S. 1965 Radiocarbon dating of ancient mortar and plaster. In Chatters, R. M. and Olson, C. A., eds., Proceedings of the 6th International 14C Conference. Clearinghouse for Federal Scientific and Technical Information. NBS CONF-650652: 338–343.Google Scholar
Van Strydonck, M. J. Y., Dupas, M. and Keppens, E. 1989 Isotopic fractionation of oxygen and carbon in lime mortar under natural environmental conditions. In Long, A. and Kra, R. S., eds., Proceedings of the 13th International 14C Conference. Radiocarbon 31(3): 610–618.Google Scholar