1 New
England Province 12
Great
(High) Plains 2 Piedmont
Province 13 Atlantic
Coastal Plain 3 Blue
Ridge Province 14 Atlantic
Continental Margin 4 Valley
and Ridge 15
Saint
Lawrence Lowlands 5 Appalachian
Plateau 16
Rocky
Mountain Province 6 Interior
Low Plateaus 17 Wyoming
Basin 7 Ozark
Plateau 18
Colorado
Plateau 8 Ouachita
Province 19
Basin
and Range Province 9 Adirondacks 20
Columbia
Plateau-Snake River Plain 10 Superior
Uplands 21
Sierra-Cascade
Province 11 Central
Lowlands 22
Pacific
Coastal Province
