Radiocarbon dates for the uppermost dates of the Mousterian assemblages from the Cantabrian region (Asturias, Cantabria and the Basque Country) calibrated against IntCal13 [42] in OxCal v.4.2 [41] assuming each sample has a 5% prior probability of being and outlier within the general t-type outlier model [43].

<p>All dates have been obtained using the ultrafiltration protocol [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0194708#pone.0194708.ref040" target="_blank">40</a>]. References are given in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0194708#pone.0194708.s002" target="_blank">S1 Table</a>. A_model = 99.8. *denotes previously unmodelled dates introduced as R-dates while the others are modelled dates at individual sites introduced as Prior PDFs.