Chronological methods 8 radiocarbon dating louisville dating sites
But what does it actually do and how much can it tell us?
The application of radiocarbon dating to groundwater analysis can offer a technique to predict the over-pumping of the aquifer before it becomes contaminated or overexploited.
The radiocarbon in the leaf fossils preserved in the sediment of Lake Suigetsu comes directly from the atmosphere and, as such, is not affected by the processes that can slightly change the radiocarbon levels found in marine sediments or cave formations.
Before the publication of this new research, the longest and most important radiocarbon dating records came from such marine sediments or cave formations, but these needed to be corrected.
As an article in the journal explains, the findings are hugely significant because they provide a much more precise way to examine radiocarbon ages of organic material for the entire 11,000-53,000-year time range.
For example, archaeologists should now be able to pinpoint more accurately the timing of the extinction of Neanderthals or the spread of modern humans into Europe.
Radiocarbon dating has been around for more than 50 years and has revolutionized archaeology.
American Institute of Physics: It places the plants, animals, and people of yore into an understandable and verifiable context.
The research team extracted cores of beautifully preserved layers of sediment, containing organic material (such as tree leaf and twig fossils), from the bottom of the Japanese lake where they had lain undisturbed for tens of thousands of years.
These counts are compared with over 800 radiocarbon dates from the preserved fossil leaves.
The only other direct record of atmospheric carbon comes from tree rings, but this only goes back to 12,593 years ago.