New C-14 Datings of Late Palaeolithic Cultures from Northwestern Europe

New C-14 Datings of Late Palaeolithic Cultures from Northwestern Europ

Copenhagen Radiocarbon Dates IV

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Copenhagen Radiocarbon Dates VII

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Copenhagen Radiocarbon Dates X

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Copenhagen Radiocarbon Dates VI

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202

Copenhagen Radiocarbon Measurements VIII: Geographic Variations in Atmospheric C14 Activity

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Tidsfæstelse af Grauballemanden ved kulstof-14 måling

Dating of Grauballe Man by Carbon-14 MeasurementShortly after excavation of Grauballe Man, and before conservation commenced, parts of the muscle and liver tissue were removed and sent to the Carbon-14 Dating Laboratory in Copenhagen for investigation.The investigation showed a content of 81,5 % Carbon-14 as compared with that of modem material. This is equivalent to an age for Grauballe Man of 1640 ± 140 years. The inaccuracy can be reduced on evaluation of all the measurements of modem carbon and of the background performed in the laboratory, and the final result is a date for the death of Grauballe Man as 310 AD ± 100 years.Repeated measurements could reduce the error still further, but those already made are sufficient to place Grauballe Man without any doubt in the Roman Iron Age.Henrik Taube

Carbon-14 dating of the peat-bog bodies

                 Carbon-14 dating of peat-bog bodies Accurate C-14 dates of samples can only be obtained if the original carbon compounds of the sample material can be isolated and purified prior to dating. In contrast to cellulose and lignin of common plant materials, which are rather resistant to chemical reactions, proteins of animal and human tissues may react chemically with humic matter and other components in bog deposits. Moreover, during the usual purification procedure proteins gradually become hydrolysed and are transformed into water soluble amino acids. Purification and isolation of the original carbon compunds in tissues deposited in bog deposits therefore pose serious problems. A method of repeated and controlled extraction of such tissues for extraneous carbon compunds, using weak acids and alkalis, has been developed and appears to give consistently pure samples for dating purposes. In the process a considerable part of the tissue is dissolved. In a single case (K-3117) 80 % of the tissue was dissolved, leaving only 20 % for the dating. However, in most cases less extensive degrees of destruction seem satisfactory. A number of the samples, both body tissues and fragments of animal skin, were treated with preservatives prior to dating. This further complicated the purification and necessitated prolonged extraction procedures. In spite of these difficulties the dating results show little scatter and lie within a rather narrow time interval, viz. the late Bronze Age and Pre­Roman Iron Age. Only a single sample (K-1396) is slightly younger, but this may be a statistical deviation. A list of the dated peat-bog bodies is given. The list includes a new date for the Grauballe Man made after a new and thorough purification of the tissue (K-3117). C13 measurements of a number of the samples suggest that the buried people were farmers rather than fishers. Henrik Taube

Copenhagen Radiocarbon Dates IX

This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202