Formation of the Appalachian Mountains. A plate tectonic history. Figure 10.2: Global paleogeography for the Cambrian period Figure 10.14: Global paleogeography for the Ordovician period Figure 10.19: Global paleogeography for the Early Devonian period Laurussia Figure 10.28: Global paleogeography for the Late Permian Period Laurussia Sequence of events responsible for the Taconic orogeny Sequence of events responsible for the Taconic orogeny Figure 10.15 Appalachian terranes