“…The northeast Gondwana margin in the Late Neoproterozoic to early Paleozoic, as exemplified by the development of the Thomson Orogen, has formed in several discrete phases: (1) a phase of rifting and passive margin development associated with the formation of Late Neoproterozoic sedimentary and mafic igneous units (Direen and Crawford, 2003a, b;Fergusson et al, 2009;Greenfield et al, 2011), (2) Cambrian convergence culminating in the Middle to Late Cambrian Delamerian Orogeny (Foden et al, 2006), an event associated with widespread continental growth in eastern Australia, (3) an Ordovician extensional event associated with backarc sedimentation, deformation and silicic calc-alkaline igneous activity (Fergusson and Henderson, 2013), and (4) compressional deformation and reworking in the Late Ordovician -Early Silurian Benambran Orogeny (Glen, 2005).…”