Extended Data Fig. 6: Thermomagnetic curves of representative samples of white (a-c) and black layers (d-f) from the studied hearths.
![Extended Data Fig. 6](https://cdn.statically.io/img/media.springernature.com/full/springer-static/esm/art%3A10.1038%2Fs41586-024-07467-0/MediaObjects/41586_2024_7467_Fig9_ESM.jpg)
Paramagnetic correction was applied in all cases. Red and blue lines indicate the heating and cooling cycles, respectively. This experiment was performed on 11 different representative samples.