The provenance of Late Ediacaran and Early Ordovician siliciclastic rocks in the Southwest Central Iberian Zone: Constraints from detrital zircon data on northern Gondwana margin evolution during the late Neoproterozoic - Pereira, M.F.; Linnemann, U.; Hofmann, M.; Chichorro, M.; Solá, A.R; Medina, J.; Silva, J.B. (2012)