Es gibt auch Funde vor den Römern:
http://archaeoforum.de/viewtopic.php?f=96&t=566&p=46769&hilit=walnuss#p46769Barbier, D., Visset, L., 1997. Logné, a peat bog of European ecological interest in the Massif Armorican, western France: bog development, vegetation and land-use history. Vegetation History and Archaeobotany 6, 69–77.
Cyprien, A.-L., Visset, L., Carcaud, N., 2004. Evolution of vegetation landscapes during the Holocene in the central and downstream Loire basin (Western France). Vegetation History and Archaeobotany 13.
Rösch, M., 1999. Evaluation of honey residues from Iron Age hill-top sites in southwestern Germany. implications for local and regional land use and vegetation dynamics. Vegetation History and Archaeobotany 8, 105–112.