Neoproterozoic magmatism and Carboniferous high-grade metamorphism in the Sredna Gora Zone, Bulgaria: An extension of the Gondwana-derived Avalonian-Cadomian belt?
Keywords: واریسکان Orogeny; HR-SIMS; U–Pb geochronology; Zircon; Variscan Orogeny; Avalonian-Cadomian