Wabaunsee Group

{{Short description|Geologic group in Kansas, United States}}

{{Infobox rockunit

| name = Wabaunsee Group

| image =

| caption =

| type = Group

| age = {{Geological range|Gzhelian}} (Virgilian stage)

| period = Late Carboniferous

| prilithology = Cyclothems of limestone and shale

| otherlithology = Mudstone, sand, coal

| namedfor = Wabaunsee County, Kansas

| namedby = C.S. Prosser

| year_ts = 1895

| region = Kansas

| country = United States

| coordinates =

| subunits =

• Wood Siding Formation
• Root Shale
• Stotler Limestone
• Pillsbury Shale
• Zeandale Limestone
• Willard Shale
• Emporia Limestone
• Auburn Shale
• Bern Limestone
• Scranton Shale
• Howard Limestone
• Severy Shale

| unitof = Virgilian series

| underlies = Admire Group

| overlies = Shawnee Group

| thickness =

| extent =

| area =

| map =

| map_caption =

}}

The Wabaunsee Group is a Late-Carboniferous geologic group in Kansas, extending into Nebraska, Iowa, Missouri, and Oklahoma.{{cite web | title = Geologic Unit: Wabaunsee | series = Geolex — Significant Publications | work = National Geologic Database | publisher = United States Geological Survey | url = https://ngmdb.usgs.gov/Geolex/UnitRefs/WabaunseeRefs_11019.html | access-date = 2024-06-02 |quote= "The formation covers one-half of Wabaunsee County and, on account of the excellent exposures along nearly every stream in the eastern and northern portions of the county, I would propose that it be called the Wabaunsee formation" (Prosser, 1895, p. 689-690). }}{{cite journal |page= 7, TEXT-FIGURE 4 |journal= Stratigraphy |volume= 10 |author= P. H. Heckel |issue= 1-2 |title= Pennsylvanian stratigraphy of Northern Midcontinent Shelf and biostratigraphic correlation of cyclothems |access-date = 2024-06-02 |year= 2013 |url= https://www.researchgate.net/publication/269699418_Pennsylvanian_stratigraphy_of_Northern_Midcontinent_Shelf_and_biostratigraphic_correlation_of_cyclothems

}} The unit is recognized in the subsurface by drillers in Colorado as Wabaunsee Formation.

In locations, some upper members are not present due to a series of erosions that occurred in late-Pennsylvanian time.{{cite book | last = Jewett | first = John M. | title = The Geology of Riley and Geary Counties, Kansas, Kansas Geological Survey Bulletin 39 | publisher = University of Kansas Publications, Kansas Geological Survey | date =1941 | url = https://www.kgs.ku.edu/General/Geology/Riley/strat02.html |quote= The upper portion of the Auburn Shale is the lowest stratigraphic unit exposed in Riley County, and the Pennsylvanian strata above the Dover limestone have almost everywhere been removed by erosion that occurred at the end of Pennsylvanian time or they are now concealed by younger deposits, especially by Recent alluvium. }}[https://www.kgs.ku.edu/General/Strat/Chart/gifs/ks_strat_chart_nov_2018.pdf Classification of Rock in Kansas], Kansas Geological Survey, 1986 (Revised November 2018).
Note: The chart illustrates the series of erosions beginning within the Willard Shale.