J.-J. Alvaro / E. Vennin, Stratigraphic signature of a terminal Early Cambrian regressive event in the Iberian Peninsula, 2011-01, fig. 2 ([Internet, 2023-08-14](https://www.researchgate.net/figure/Geological-map-of-the-pre-Hercynian-rocks-exposed-in-the-Iberian-Chains-northeast-Spain_fig4_237174904))