The conservation-restoration methodology used on most Middle Pleistocene layers from
the Postes Cave site fossils is minimal intervention. The fossils from Stratigraphic
Unit Pleistocene 1 layer are covered by a 0,3 m-thick speleothem around the bones.
This work describes four restoration treatments applied to one of the fossils from
this layer since its discovery, to reverse fossil deterioration and/or total or partial
loss. To extract the bone it was necessary to hit the speleothem and fracture it,
damaging and breaking the fossil into small fragments. These treatments consisted
in the application of a bandage in situ, removal of the bandage, cleaning, consolidation
and reconstruction in the research laboratory.
We have recovered and stabilized the fossil so we can take, touch and move them to
carry out a taxonomic study. These studies have resulted in the identification of
the fossil as an Ursus arctos tibia.