10 regions OK
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Very old Mountain system
Arbuckle Mnts
Western part of the state with buttes, spring, and caves
Gypsum Hills
Area of panhandle
High plains
Roughest part of the state
Ouachita Mnts
Northeastern corner of state with prairies and wood
Ozark Plateau
Oklahoma great agriculture showplace
Prairie Plains
Rolling land in middle of state
Red Bed Plains
Very low elevations and very rich soil
Red River Plains
Contains some of the states important oil fields
Sandstone Hills
Formed with ancient lava flows from volcanoes
Wichita Mnts