Extended Data Fig. 3: Top of the S1 speleothem with evidence of thermal alteration. | Nature Human Behaviour
The photograph shows square J'36 of the Cueva Des-Cubierta after having been excavated up to the top of speleothem S1. The dark spot indicates the thermal alteration experienced by the upper part of this speleothem. At this location, the base of Level 3 (completely excavated at the time of taking the photograph) rested directly on S1. The thermal alteration of the top of speleothem S1 is therefore evidence of the existence of hearths inside the cavity during the deposition of Level 3 (The Supplementary Figs. 31 to 39 include more information about the heat-altered elements in spatial association with this speleothem dark spot). Photo credit: Alfonso Dávila.