Active and passive grindstones. From back to front: Las Palas Plane (El Almanzora Caves, province of Almeria, Andalusia) and Los Murcielagos Cave (Zuheros, province of Cordoba, Andalusia); Unknown origin and Los Marmoles Cave (Priego, province of Cordoba, Andalusia) and Mejorada del Campo (Community of Madrid, Spain). National Archaeological Museum. Madrid. Spain.
Active and passive grindstones. From back to front: Las Palas Plane (El Almanzora Caves, province of Almeria, Andalusia) and Los Murcielagos Cave (Zuheros, province of Cordoba, Andalusia); Unknown origin and Los Marmoles Cave (Priego, province of Cordoba, Andalusia) and Mejorada del Campo (Community of Madrid, Spain). National Archaeological Museum. Madrid. Spain.