Many of the shaft fillings at Casa Montero included a few fragments of charcoal. Our anthracological specialists (experts in the identification and interpretation of archaeological wood) indicate that the Neolithic groups that used the mine mostly burnt Holm/Kermes oak and juniper, although they also had Alnus spp., Prunus spp. and Viburnum tinus at their disposal.

The sediments filling the shafts also include pollen remains, but these are largely of pine, a species not represented among the charcoal fragments. The mining activity removed and ended up mixing sediments of Miocene and Pleistocene age. This, plus the speed with which the shafts were filled, means that the pollen remains do not record the vegetation present in Neolithic times, and cannot be used to help reconstruct the landscape in which these mining groups moved.