The Pittsburgh-Huntington basin is the broad, spoon-shaped synclinorium that lies between the axis of the Cincinnati anticline and the eastern margin of the Appalachian plateaus and extends from New York to Kentucky. It includes and in large part is coextensive with the northern Appalachian coal field. The southern end of the basin is marked by one of the major changes in Appalachian trend, from north 70 degrees east to north 30 degrees east, and by a zone of faults that extends from east to west across the State of Kentucky. To the southwest the synclinal structure continues in the narrow trough of the southern Appalachian coal field.
The structure of this region has long been known, and detailed structure maps of a large part of it have been published, but no generalized structure map of the basin as a whole, based on the detailed studies, has been compiled. In . . .