Geologic units in Allen county, Kansas

Additional scientific data in this geographic area

Kansas City Group (Middle Pennsylvanian- Missourian) at surface, covers 78 % of this area

Includes: Lane Shale,Wyandotte Limestone (base WY), Liberty Memorial Shale, Iola Limestone (base I), Chanute Shale (base CH), Dewey Limestone, Nellie Bly FM, Cherryvale FM, Dennis Limestone (base DN), Galeburg Shale, Mound Valley Limestone, Ladore Shale, Swope Limestone (base SW), Elm Branch Shale, Hertha Limestone.

Lansing Group (Middle Pennsylvanian- Missourian) at surface, covers 13 % of this area

Stanton Limestone- three limestone and two shales members, ranges from 15 to 130 ft. thick. Vilas Shale- sandy, carbonaceous gray shale with some sandstone and limestone locally, ranges from 5 to 120 ft. thick. Plattsburg Limestone- two limestone members seperated by shale, ranging from 25 to 115 ft. thick.

Alluvium (Holocene to Pleistocene) at surface, covers 8 % of this area

unconsolidated sand, silt, clay, and gravel

Alluvium (Tertiary) at surface, covers 0.4 % of this area

largely chert gravel

Douglas Group (Late Pennsylvanian- Virgilian) at surface, covers 0.3 % of this area

Lawrence FM (base LA)- mostly gray shale and sandstone with minor red shale, coal, gray limestone and conglomerate, thickness ranges from 140ft to 250 ft. Stranger FM- five members containing sandstone, shale, and minor limestone, coal and conglomerate ranging from 100 ft. to 180 ft. thickness.

Pleasanton Group (Middle Pennsylvanian- Missourian) at surface, covers < 0.1 % of this area

Includes: Shale Hill FM (base SH), and Hepler FM. Chiefly gray to very dark gray or yellowish gray shale with sandstone members and some limestone and coal.