Although these divisions seemed adequate for the region to which the designations were originally applied (parts of the Alps and plains of Italy), when the same system was later extended to other parts of Europe and to America, it proved to be inapplicable.
Iako su te podjele izgledale adekvatne za regiju na koju su se originalno bile primjenjivale (dijelova Alpa i ravnice Italije), taj sustav nije se mogao primijeniti na ostale dijelove Europe i Ameriku.