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Professor Tom Higham: List of publications
Archaeology: Radiocarbon Dates
A new series of radiocarbon measurements from Japan's Lake Suigetsu will give scientists a more accurate benchmark for dating materials, especially for older objects, according to a research team that included Oxford University's Radiocarbon Accelerator Unit. 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. As an article in the journal Science 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,,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. This research is part of a large international research team, led by Professor Takeshi Nakagawa of Newcastle University, studying the cores for clues about past climate and environmental change. Radiocarbon is continuously produced in the upper atmosphere. These roughly constant levels of radiocarbon from the atmosphere are then incorporated into all living organisms.
What is Carbon Dating?
The number of protons in the nucleus of an atom is called its radiometric number. The sum of protons plus neutrons is the mass number. We designate a specific group of atoms by using the term "nuclide. Potassium-Argon dating:.
Radiocarbon dates of two musk ox vertebrae reveal ice-free conditions during late Marine Isotope Stage 3 in central South Norway. Ancient human genome-wide data from a year interval in the Caucasus corresponds with eco-geographic regions. Histories of deposition: