This map of the Valley of the Appalachian Mountains and the following Karst region of Virginia is posted on page 402 of Process Geomorphology (1995) written by Dale F. Ritter, Craig R. Kochel, and Jerry R. Miller. My foundation in the report of the Karst region of the Appalachian Mountains and the subsequent American Atlantic coast, especially Virginia. The shaded area represents the general karst area of the whole United States.
Located in the Appalachian Mountains and the Appalachian Plate west of the valley. It is also known as the Cumberland Plateau. It covers the mountains on the flat top and is divided by sharp valleys. The altitude is 1,500 to 1,800 feet. South of the Appalachian Plateau, in the southwest of Chattanooga, there is an observatory mountain with views of the seven states. The Gulf Coast Plain is in the west of Highland Rim and Nashville Basin. It is the largest land area in Tennessee. This area starts in the Gulf of Mexico and the north spreads to the south of Illinois. Gulf Coast Plain (Tennessee) is divided into three sections from the East Tennessee River to the West Mississippi River. The west bank of the Tennessee River is the easternmost hilly area. The width of this part is only 10 miles
The smallest geographical area in Georgia is the Appalachian plateau, often called the plateau. The plateau is a flat or gently sloping ground located in an adjacent valley or lowland. Nationally, the Appalachian Plateau extends from New York to Alabama along a series of plateaus from the western edge of the Appalachian Highlands. The southernmost tip of the country - Cumberland Plateau - contains about 300 square miles in the northwest corner of Georgia. Here are two flat top features separated by narrow valleys, Sand Mountain and the famous Lookout Mountain. Located to the east of Guanjing Mountain is Pigeon Mountain
Appalachian Plateau: The western part of Blue Ridge is the Appalachian Plateau. The Appalachian Plateau in Maryland covers the triangle at the westernmost end of Maryland. The Allegheny Mountains cover most of the area. Backbone Mountain is the highest point in Maryland and is in this area. The deep valley cut into the plateau by the river is characteristic of this compact forest area