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Mineral Resources > Online Spatial Data > Geology > by state > West Virginia Geology

Geologic units in Putnam county, West Virginia

Allegheny Formation (Pennsylvanian) at surface, covers 0.1 % of this area

Allegheny Formation - cyclic sequences of sandstone, siltstone, shale, limestone, and coal. Includes the Freeport, Kittanning and Clarion coals, also, the Princess coals of Kentucky . Extends from the top of the Upper Freeport coal to the top of the Homewood Sandstone.

Lithology: sandstone; siltstone; shale; limestone; coal

Quaternary Alluvium (Quaternary) at surface, covers 10 % of this area

Quaternary Alluvium - alluvial deposits of sand, gravel, silt, and clay.

Lithology: alluvium

Dunkard Group (Permian/Pennsylvanian) at surface, covers 31 % of this area

Dunkard Group - non-marine cyclic sequences of sandstone, siltstone, red and gray shale, limestone, and coal. Contains the Greene, Washington and Waynesburg Formations. Extends from the top of the exposed bed rock section to the top of the Waynesburg coal. Includes the Washington coals and limestones. Palynological evidence favors a Pennsylvanian age, at least for the lower portion.

Lithology: sandstone; siltstone; shale; limestone; coal

Conemaugh Group (Pennsylvanian) at surface, covers 22 % of this area

Conemaugh Group - cyclic sequences of red and gray shale, siltstone, and sandstone, with thin limestones and coals. Mostly non-marine. May be divided into Casselman and Glenshaw Formations. Extends from the base of the Pittsburgh coal to the top of the Upper Freeport coal. Includes the Elk Lick, Bakerstown, and Mahoning coals, and the Ames and Brush Creek Limestones.

Lithology: shale; siltstone; sandstone; limestone; coal

Monongahela Group (Pennsylvanian) at surface, covers 37 % of this area

Monongahela Group - non-marine cyclic sequences of sandstone, siltstone, red and gray shale, limestone, and coal. Contains the Uniontown and Pittsburgh Formations. Extends from the top of the Waynesburg coal to the base of the Pittsburgh coal. Includes the Waynesburg, Uniontown, Sewickley, Redstone and Pittsburgh coals. Thickness is 170 feet in Mineral and Grant Counties.

Lithology: sandstone; siltstone; shale; limestone; coal