The Appalachian Plateau is the western part of the Appalachian mountains, stretching from New York to Alabama. The Appalachian Mountains ( often called the Appalachians, are a vast system of mountains in eastern North America. New York ( is a state in the Mid-Atlantic and Northeastern regions of the United States and is the nation's third most populous Alabama (formally the State of Alabama;) is a State located in the southern region of the United States of America. The plateau is a second level United States physiographic region. There are eight distinct physiographic divisions within the Continental United States.
From the east the escarpment that forms the edge of the plateau has the appearance of a mountain range. In Geomorphology, an escarpment is a transition zone between different physiogeographic provinces that involves a sharp steep Elevation differential characterized [1] However, technically it is an eroded plain of sedimentary rock not mountains. Sedimentary rock is one of the three main rock types (the others being igneous and Metamorphic rock) [2] A large portion of the plateau is a coalfield formed during the Pennsylvanian Period. A coalfield is an area of certain uniform characteristics where coal is mined The Pennsylvanian is a subperiod of the Carboniferous period lasting from roughly   to  Ma (million years ago [3] The surface of the plateau slopes gently to the northwest and merges imperceptibly into the Interior Plains. The Interior Plains is a vast physiographic region that spreads across the Laurentian craton of North America
The main physiographic sections (generally ordered from the northeast to the southwest) of the plateau are named the Mohawk section, the Catskill section, the southern New York section, the Allegheny Plateau section, the Kanawha section, the Cumberland Plateau section, and the Cumberland Mountains section. The Catskill Mountains (also known as simply the Catskills) a natural area in New York State northwest of New York City and southwest of Albany The Allegheny Plateau is a large Dissected plateau area in western and central New York, northern and western Pennsylvania, northern West Virginia The Cumberland Plateau is the southern part of the Appalachian Plateau. The Cumberland Mountains are a mountain range in the southeastern section of the Appalachian Mountains. [4]