Added: Paulina Doll - Date: 07.09.2021 03:13 - Views: 30953 - Clicks: 9484
Radiocarbon dating is a key tool archaeologists use to determine the age of plants and objects made with organic material. But new research shows that commonly accepted radiocarbon dating standards can miss the mark -- calling into question historical timelines. Archaeologist Sturt Manning and colleagues have revealed variations in the radiocarbon cycle at certain periods of time, affecting frequently cited standards used in archaeological and historical research relevant to the southern Levant region, which includes Israel, southern Jordan and Egypt.
These variations, or offsets, of up to 20 years in the calibration of precise radiocarbon dating could be related to climatic conditions. Pre-modern radiocarbon chronologies rely on standardized Northern and Southern Hemisphere calibration curves to obtain calendar dates from organic material. These standard calibration curves assume that at any given time radiocarbon levels are similar and stable everywhere across each hemisphere.
So we wondered whether the radiocarbon levels relevant to dating organic material might also vary for different areas and whether this might affect archaeological dating. The authors measured a series of carbon ages in southern Jordan tree rings, with established calendar dates between and A. They found that contemporary plant material growing in the southern Levant shows an average offset in radiocarbon age of about 19 years compared the current Northern Hemisphere standard calibration curve.
Manning noted that "scholars working on the early Iron Age and Biblical chronology in Jordan and Israel are doing sophisticated projects with radiocarbon age analysis, which argue for very precise findings. This then becomes the timeline of Carbon 14 dating problems. But our work indicates that it's arguable their fundamental basis is faulty -- they are using a calibration curve that is not accurate for this region.
Applying their to ly published chronologies, the researchers show how even the relatively small offsets they observe can shift calendar dates by enough to alter ongoing archaeological, historical and paleoclimate debates. And yet these studies Materials provided by Cornell University. Original written by Daniel Aloi. Note: Content may be edited for style and length. Science News. The Cornell-led team questioned those assumptions. Story Source: Materials provided by Cornell University. Journal Reference : Sturt W. Timothy Jull, Todd E. Fluctuating radiocarbon offsets observed in the southern Levant and implications for archaeological chronology debates.
ScienceDaily, 5 June Cornell University. Inaccuracies in radiocarbon dating. Retrieved July 17, from www. Using a recently developed method, based on the presence of sudden spikes in carbon ScienceDaily shares links with sites Carbon 14 dating problems the TrendMD network and earns revenue from third-party advertisers, where indicated. Print Share. Boy or Girl? Living Well. View all the latest top news in the environmental sciences, or browse the topics below:. Keyword: Search.Carbon 14 dating problems
email: [email protected] - phone:(285) 874-1064 x 7966
How Does Carbon Dating Work