“…Figure 13. Lower limit of ε Nd t vs. crystallization age for Avalonian igneous rocks compared to (1) igneous and sedimentary rocks and xenoliths (Mb = metabasaltic; Ms = metasedimentary) in Devonian intrusions from the Meguma and Gander terranes (Clarke & Halliday, 1985;Clarke, Halliday & Hamilton, 1988;Clarke, Chatterjee, & Giles, 1993;Eberz et al 1991;Kerr, Jenner & Fryer, 1995); (2) Grenville-aged rocks of eastern and southern Ontario and northern New York state (Dickin & McNutt, 1989;Dickin, McNutt & Clifford, 1990;Marcantonio et al 1990;Daly & McLelland, 1991); (3) igneous rocks in and on the Blair River Complex (triangles: Barr & Hegner, 1992); (4) plutonic rocks from West Africa (data point and evolution envelope from Allegre & Ben Othman, 1980) and (5) the Tocatins Province, Brazil (Pimentel & Fuck, 1992). the ε Nd -time signatures of the felsic magmas in the Meguma Terrane (White Rock Formation and uncontaminated Upper Devonian plutonic rocks) reveals that they too had an isotopic source indistinguishable from that beneath the Avalon Terrane.…”