1. Institute of Geology, Department of Dynamic and Regional Geology, Adam Mickiewicz University, Makow Polnych 16, 61-606, Poznań, Poland
2. Institute of Physics, Department of Radioisotopes, Radiocarbon Laboratory, Silesian University of Technology, Krzywoustego 2, 44-100, Gliwice, Poland
3. Poznań Radiocarbon Laboratory, ul. Rubież 46, 61-612, Poznań, Poland
4. School of Engineering and Science, University of The West of Scotland, High Street, PA1 2BE, Paisley, Scotland