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- Old_wood abstract "The old wood effect or old wood problem is a pitfall encountered in the archaeological technique of radiocarbon dating. A sample will provide misleading or confusing results if materials of different ages are deposited in the same context. Stratification is not always clear-cut in practice. In the case of dating megalithic tombs, indirect evidence for the age of the tomb must always be obtained, because stone (or the time of moving a stone) can not be dated. When a number of objects are recovered from one deposit, the terminus post quem is based on the dating from the 'youngest' find. Even though other items in the same stratum indicate earlier dates, they may have been deposited at the same time. The deposit must be as young, or younger than the youngest object it contains. Thus excavators look to post holes, pits, or find spots under the orthostats for clues to construction dates. The possibility that something (organic) was already in situ must always be considered, especially if the results appear suspiciously early. The old wood problem can appear in marine archaeology. Researchers need to check if stumps from a Mesolithic or Palaeolithic submerged forest are to be found in the area. (If they do, the possibility of one sticking up through, e. g., a shipwreck and giving misleading dates must be considered.)Organic samples which are not derived from the same part of an organism, may show dating variations which blur and obscure the interpretation being attempted. If compelling archaeological reasons for supposing that the ages come from exactly contemporary samples do not exist, then results must be regarded as suspect. If there exists no prior reason to believe that two samples are truly of the same age, and even if their ages are statistically indistinguishable, they are as likely to be as far apart in true age as the measured difference between them as they are to be of the same age.Charcoal was seen historically as an ideal medium for carbon dating. When long-lived tree species, such as oak and juniper, are used, however, there is a particular danger of encountering the "old wood" problem. For example, the date being measured may be from heartwood, which is already many centuries old by the time the tree was felled. Another difficulty is that of a possible time-lag between felling and final deposition. The timber may have had an extensive history of use and re-use. A method of ameliorating this problem is to date young growth, if available, for example hazel twigs.Dating of artefacts using Accelerator Mass Spectrometry is the gold standard dating method of today; charcoal-sourced dates are seen as unreliable. In establishing the chronology of a site, a representative spread of dates is required before interpretation can be attempted.".
- Old_wood wikiPageID "8332633".
- Old_wood wikiPageLength "3567".
- Old_wood wikiPageOutDegree "18".
- Old_wood wikiPageRevisionID "634829062".
- Old_wood wikiPageWikiLink Accelerator_Mass_Spectrometry.
- Old_wood wikiPageWikiLink Accelerator_mass_spectrometry.
- Old_wood wikiPageWikiLink Archaeological_context.
- Old_wood wikiPageWikiLink Archaeology.
- Old_wood wikiPageWikiLink Category:Methods_and_principles_in_archaeology.
- Old_wood wikiPageWikiLink Charcoal.
- Old_wood wikiPageWikiLink Hazel.
- Old_wood wikiPageWikiLink Juniper.
- Old_wood wikiPageWikiLink Marine_archaeology.
- Old_wood wikiPageWikiLink Maritime_archaeology.
- Old_wood wikiPageWikiLink Megalithic_architectural_elements.
- Old_wood wikiPageWikiLink Mesolithic.
- Old_wood wikiPageWikiLink Oak.
- Old_wood wikiPageWikiLink Orthostat.
- Old_wood wikiPageWikiLink Palaeolithic.
- Old_wood wikiPageWikiLink Paleolithic.
- Old_wood wikiPageWikiLink Post_hole.
- Old_wood wikiPageWikiLink Posthole.
- Old_wood wikiPageWikiLink Radiocarbon_dating.
- Old_wood wikiPageWikiLink Stratification_(archeology).
- Old_wood wikiPageWikiLink Stratigraphy_(archaeology).
- Old_wood wikiPageWikiLink Submerged_forest.
- Old_wood wikiPageWikiLink Terminus_post_quem.
- Old_wood wikiPageWikiLink Wikt:pit.
- Old_wood wikiPageWikiLinkText "Old wood".
- Old_wood wikiPageWikiLinkText "old wood".
- Old_wood hasPhotoCollection Old_wood.
- Old_wood wikiPageUsesTemplate Template:Reflist.
- Old_wood subject Category:Methods_and_principles_in_archaeology.
- Old_wood hypernym Pitfall.
- Old_wood type Method.
- Old_wood comment "The old wood effect or old wood problem is a pitfall encountered in the archaeological technique of radiocarbon dating. A sample will provide misleading or confusing results if materials of different ages are deposited in the same context. Stratification is not always clear-cut in practice. In the case of dating megalithic tombs, indirect evidence for the age of the tomb must always be obtained, because stone (or the time of moving a stone) can not be dated.".
- Old_wood label "Old wood".
- Old_wood sameAs m.026_r7q.
- Old_wood sameAs Q7085502.
- Old_wood sameAs Q7085502.
- Old_wood wasDerivedFrom Old_wood?oldid=634829062.
- Old_wood isPrimaryTopicOf Old_wood.