High Quality Content by WIKIPEDIA articles! The Arkansas Delta is one of the six natural regions of the state of Arkansas. The region runs along the eastern border of the state next to the Mississippi River from Eudora north to Blytheville and as far west as Little Rock. It is part of the Mississippi River Alluvial Plain, itself part of the Mississippi embayment. The flat plain is bisected by Crowley`s Ridge, a narrow band of rolling hills rising 250 to 500 feet (76 to 150 m) feet above the flat delta plains. Crowley`s Ridge is home to several towns and cities, including Jonesboro. The region`s lower western border follows the Arkansas River just outside Little Rock down through Pine Bluff where the border shifts to Bayou Bartholomew stretching south to the Arkansas-Louisiana state line. While the Arkansas Delta shares many geographic similarities with the Mississippi Delta, it is distinguished by its five unique sub-regions including the St. Francis Basin, Crowley`s Ridge, the White River Lowlands, the Grand Prairie, and the Arkansas River Lowlands.