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Lower Valmeyeran (Keokuk-Sedalia) Series

Lower Valmeyeran (Keokuk-Sedalia) Series
State Illinois
Name Lower Valmeyeran (Keokuk-Sedalia) Series
Geologic age Mississippian
Comments This part of the series includes the following formations: Keokuk Limestone, Burlington Limestone, Fern Glen Limestone, Sedalia Limestone. Collectively these units are about 95% limestone, some cherty limestone and incidental shale
Primary rock type limestone
Secondary rock type shale
Other rock types
Lithologic constituents
Major
Sedimentary > Carbonate > LimestoneThis part of the series includes the following formations: Keokuk Limestone, Burlington Limestone, Fern Glen Limestone, Sedalia Limestone. Based on the stratigraphic column on the 1967 paper map, collectively these units are about 95% limestone, some cherty limestone and incidental shale
Incidental
Sedimentary > Clastic > Mudstone > ShaleThis part of the series includes the following formations: Keokuk Limestone, Burlington Limestone, Fern Glen Limestone, Sedalia Limestone. Based on the stratigraphic column on the 1967 paper map, collectively these units are about 95% limestone, some cherty limestone and incidental shale
Map references
Willman, H.B., and others, (compilers), 1967, Geologic Map of Illinois: Illinois State Geological Survey, scale= 1:500,000, paper.
Unit references
Willman, H.B., and others, (compilers), 1967, Geologic Map of Illinois: Illinois State Geological Survey, scale= 1:500,000, paper.
Counties Brown - Calhoun - Cass - Champaign - Cook - Fulton - Greene - Hancock - Henderson - Iroquois - Jersey - Knox - McDonough - Madison - Mason - Monroe - Morgan - Randolph - Schuyler - Scott - Vermilion - Warren