 In addition to abundant water resources latent in the Arbuckle-Simpson Aquifer, the region has some of the highest oil and gas production in the state, with Carter County seated as the largest producer in the state.The Arbuckle Mountains are the defining geographical entity in this region, with peaks (once taller than the Rockies) eroded down to their current elevation of 200-300' above the surrounding terrain.Many lakes are also located throughout the region, often shaped by the irregular topography of the underlying Arbuckle range.