The Ozark Plateau lies in the northwestern and north central part of Arkansas. It also covers parts of Missouri, Illinois and Oklahoma, the Ozark Plateau is an area of rugged hills and deep valleys. They are part of a regional uplifted dome with the central core of that dome located in the exposed granites of the St. Francis Mountains of Missouri (AGC) The Ozark Plateau is characterized by limestones and dolomites, with many caves, and cave and karst topography. To the south, river gorges up to 1,500 feet deep, carved by swiftly flowing streams, cut through the plateau. The steep hills in this area of the Plateau are called the Boston Mountains. The Boston Mountains give way to the Arkansas Valley to the south of the Plateau.
 

If you would like to learn more about this region of Arkansas go to Ozarks.