AGS / Education / Geology Resources / Physiographic Regions / Ozark Plateaus
The Ozark Plateaus Region is a thoroughly dissected area with steep valley walls and narrow floors. This region is divided into three broad plateau surfaces based on elevation and age of surface rocks. Click here to learn about the geology of the Ozark Plateaus Region.
The Salem Plateau contains the oldest rock at the surface - Ordovician dolostones, sandstones and limestones. This is also the lowest plateau surface with some of the highest elevations reaching between 800 and 1400 feet above sea level.
Dolostone with interbedded shale in the Powell Formation
Dolostone in the Cotter Formation at Cotter, AR
Boone Formation forming buttresses along Bear Creek in Searcy County.
The Springfield Plateau (foreground) near Marshall, Arkansas.
The Boston Mts. Plateau contains the youngest rock at the surface - Early Pennsylvanian sandstones and shales with minor limestones. This is also the highest plateau surface with some of the highest elevations reaching 2200-2500 feet above sea level.
Bloyd Formation near Phillips Ford
"middle Bloyd sandstone" at Buzzards Roost.