AXIAL REALM
Acadian clastic wedge
Alleghanian plutonism
CAROLINIA
Composite magmatic arc and other magmatic rocks
Continental rift basins and magmatism related to formation of the Atlantic Basin
Extensional basin and cover rocks
GOOCHLAND DOMAIN
Grenville basement of Laurentia including ca. 1 Ga inliers within the hinterland
Iapetus drift facies - passive margin sequence
Iapetus rift facies
Infrastructural magmatic-arc/oceanic rocks
LAURENTIAN REALM (entire orogen)
Marine basin
Metamorphic rocks of unknown origin
Mid-Paleozoic clastic wedge and time-equivalent rocks
Mid-Paleozoic magmatism mainly in Axial Realm
Multiply tectonized accretionary complex
Northern Appalachians
PERI-GONDWANAN REALM
PIEDMONT DOMAIN
Peri-Laurentian Arc System (Iapetan)
Southern Appalachians
Suprastructural magmatic-arc and associated rocks
Syn-Acadian sedimentary and magmatic rocks
Taconic clastic wedge