Sketch map of the Variscan terrains of SW Europe outlining the location of several felsic (sub)volcanic complexes of Furongian–Lower Ordovician age, adapted from Ballèvre et al. (2014). Zones in the Iberian Massif: CIZ: Central Iberian; CZ: Cantabrian; GTMZ: Galicia–Trás-os-Montes; OMZ: Ossa-Morena; SPZ: South-Portuguese; WALZ: West Asturian–Leonese. V: Vosges; BF: Black Forest; MM: Maures Massif; CO: Corsica. Abbreviations for the (sub)volcanic formations. In the Iberian Massif, LQ: Loiba and Queiroga series (Valverde-Vaquero et al., 2005); MS: Mora and Saldanha volcanic complexes (Dias Da Silva et al., 2014); P: volcanics from the Paraño Group in the Bragança–Alcañices area (Farias et al., 2014). Armorican Massif, Pn: Porphyroid nappe and B: Brétignolles metavolcanics (Ballèvre et al., 2012); IG: Île-de-Groix felsic gneisses (El Korh et al., 2012); LC: La Châtaigneraie metavolcanics (Bouton and Branger, 2008). In the Massif Central, the Larroque rhyolitic formation in the St-Sernin-sur-Rance (R) and St-Salvi-de-Carcavès nappes (SSC) (Guérangé-Lozes and Burg, 1990; Pouclet et al., 2017); TP: the Génis rhyolites in the Thiviers-Payzac Unit (Melleton et al., 2010; Pouclet et al., 2017); Nz: the Nouzier metavolcanics (Quesnel et al., 2009). In Sardinia, SV: San Vito Formation volcanites and TG: Li Trumbetti and Mt. Geisgia rhyolites (Oggiano et al., 2010).