1 23 Vegetation History and Archaeobotany The Journal of Quaternary Plant Ecology, Palaeoclimate and Ancient Agriculture - Official Organ of the International Work Group for Palaeoethnobotany ISSN 0939-6314 Veget Hist Archaeobot DOI 10.1007/s00334-016-0562-2 Charred olive stones: experimental and archaeological evidence for recognizing olive processing residues used as fuel Freek Braadbaart, Elena Marinova & Anaya Sarpaki