L'altopiano del Columbia è una regione geografica e geologica degli Stati Uniti d'America che ricopre gran parte del territorio degli Stati di Washington, Oregon e l'ovest dell'Idaho.
La regione è costituita da un vasto altopiano basaltico situato tra la Catena delle Cascate e le Montagne Rocciose attraversato dal fiume Columbia.
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Copyright: Creative Commons CC BY 2.0
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