Geologic units in Breckinridge county, Kentucky

Rocks of Chesterian age, lower part (Upper Mississippian) at surface, covers 62 % of this area

Rocks of Chesterian age, lower part

Rocks of Chesterian age, upper part (Upper Mississippian) at surface, covers 16 % of this area

Rocks of Chesterian age, upper part

Ste. Genevieve and St. Louis Limestones, undivided (Mississippian) at surface, covers 15 % of this area

Ste. Genevieve and St. Louis Limestones, undivided; includes Salem Limestone west of Christian County

Caseyville Formation (Lower to Middle Pennsylvanian) at surface, covers 4 % of this area

Caseyville Formation

Alluvium (Pleistocene to Holocene) at surface, covers 2 % of this area

Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks

Glacial deposits, undifferentiated (Pleistocene to Holocene) at surface, covers 0.3 % of this area

Glacial deposits, undifferentiated; shown locally

Sandstone member of the Mooretown Formation (Mississippian) at surface, covers < 0.1 % of this area

Sandstone member of the Mooretown Formation

Tradewater Formation (Middle Pennsylvanian) at surface, covers < 0.1 % of this area

Tradewater Formation

Stephensport Group (Mississippian) at surface, covers < 0.1 % of this area

Sandstone, micritic and skeletal limestone, and shale

West Baden Group (Mississippian) at surface, covers < 0.1 % of this area

Shale, sandstone, and micritic and skeletal limestone