40Ar/39Ar data for Resende-Ilha Grande Tholeiitic Dike Swarm point to early extensional episode ca. 156-144 Ma.
The event precedes the onset of Paraná LIP and the Gondwana break-up.
Three high-TiO
T
The swarm represents the precise onshore projection of Pelotas-Santos rift propagator, in the N–S direction.