The Yazoo, Tallahatchie, Yalobusha, Sunflower, Big Black, Pascagoula and Pearl rivers are also navigable to a limited extent.
The principal lines are the Illinois Central, the Yazoo & Mississippi Valley, the Southern, the Mobile & Ohio, the New Orleans & North-eastern, the Kansas City, Memphis & Birmingham, the Mobile, Jackson & Kansas City, the Alabama & Vicksburg, and the Gulf & Ship Island.
Deposits of the Tertiary period form the basis of more than half the state, extending from the border of the Cretaceous westward nearly to the Yazoo Delta and the Mississippi Bottom, and southward to within a few miles of the Gulf coast.
Cotton is grown in every county of the state, but the large yields are in the Delta (Bolivar, Coaohma, Washington, Yazoo and Leflore counties), the greatest cotton-producing region of the world, and in Monroe, Lowndes and Noxubee counties on the Alabama border.
Pine stumps and waste limbs are utilized, notably at Hattiesburg, for the manufacture of charcoal, tar, creosote, turpentine, &c. Fisheries Fishing is a minor industry, confined for the most part to the Mississippi Sound and neighbouring waters and to the Mississippi and Yazoo rivers.