Appalachian Phase  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Appalachian Phase
UFAppalachian Orogeny
 Appalachian structure
RTorogeny
 Appalachians
 tectonics
SNBefore 1978, also search orogeny AND Appalachian.