The Carbondale Group is a Middle Pennsylvanian aged unit found in the Illinois Basin.
This geologic unit is made up of siliciclastic rock and coal beds.
It is the lower formation in the Carbondale Group, and includes six named members, "which, in ascending order, are the Seelyville Coal, Coxville Sandstone, Colchester Coal, Mecca Quarry Shale, Velpen Limestone, and Survant Coal Members, and unnamed units of sandstone, shale, and clay".
The Linton Formation was first named on a United States Geological Survey coal investigations map in 1950.
[4] The type locality is along the tributaries of Lattas Creek, approximately 4 miles north of Linton, Greene County, Indiana.