Geologic units in Atchison county, Missouri

Wabaunsee Group (Late Pennsylvanian-Upper Series-Virgilian Stage) at surface, covers 50 % of this area

Cyclic deposits, principally shale, sitlstone, sandstone with thin limestone beds and minor coal.

Shawnee Group (Late Pennsylvanian-Upper Series-Virgilian Stage) at surface, covers 25 % of this area

Cyclic deposits, limestone and shale with sandstone and siltstone.

Holocene series (Quaternary-Holocene Series) at surface, covers 24 % of this area

Alluvium - clay, silt, sand, and gravel.

Wabaunsee Group (Upper Pennsylvanian, middle-upper Virgilian) at surface, covers 0.2 % of this area

Interval includes Howard, White Cloud, Scranton, Bern, Auburn, Emporia, Willard, Zeandale, Pillsbury, Stotler, Root formations. Primary Lithologies: shale, light to dark gray; mudstone, gray, part laminated silty to sandy. Secondary Lithologies: limestone, fossiliferous, part coated grain/Osagia; pedogenic mudstone, part red to maroon, part calcareous/nodular; siltstone to very fine sandstone. Minor: black shale; coal. Maximum thickness 320 ft (98 m) in Fremont County.

Wabaunsee Group (Late Pennsylvanian - Virgilian) at surface, covers < 0.1 % of this area

Shale, sandstone, and interbedded limestone. Shale is light gray to dark gray, greenish gray, red, or black; contains very thin layers of siltstone; locally very fossiliferous, carbonaceous. Sandstone is brownish gray to yellowish gray, or gray, argillaceous , and micaceous. Limestone is dark gray to medium gray, yellowish gray, thin bedded to thick bedded; very fossiliferous. Contains coal beds less than 1 ft. thick. Approx. max thickness 300 ft

Shawnee Group (Upper Pennsylvanian, lower-middle Virgilian) at surface, covers < 0.1 % of this area

Interval includes Oread, Kanwaka, Lecompton, Tecumseh, Deer Creek, Calhoun, Topeka formations. Primary Lithologies: limestone, fossiliferous, part coated grain/Osagia; shale/mudstone, light to dark gray. Secondary Lithologies: pedogenic mudstone, part calcareous/nodular; siltstone to very fine sandstone; black shale, phosphatic. Minor: chert; coal, coaly shale; red-brown mudstone. Maximum thicknesses 190-220 ft (58-67 m).