Fern Glen Formation

Fern Glen Formation
Stratigraphic range: Mississippian Osagean
Type	Formation
Underlies	Burlington Limestone
Overlies	Chouteau Group^[1]
Lithology
Primary	Limestone
Other	Shale, chert^[2]
Location
Country	United States
Extent	East central and southeastern Missouri,^[2] Illinois
Type section
Named for	Fern Glen resort on the Meramec River
Named by	Weller in 1906^[1]

The Fern Glen Formation is a geologic formation in eastern and southeastern Missouri. It preserves fossils dating back to the Osagean Series of the Mississippian subperiod.

The Fern Glen is richly fossiliferous with abundant crinoids, corals, brachiopods and bryozoa.^[2]

References

^ ^a ^b Thompson, Thomas L., 2001, Lexicon of Stratigraphic Nomenclature in Missouri, Missouri Department of Natural Resources, Division of Geology and Land Survey, Report of Investigation Number 73, p 102-3
^ ^a ^b ^c Howe, W. B. and J. W. Koenig, The Stratigraphic Section in Missouri, Missouri Geological Survey, 1961, p. 62

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.

Chronostratigraphy of Illinois

Holocene	Glacial alluvium, drift, and loess
Pleistocene	Embayment Megagroup Mounds Gravel Grover Gravel

Pliocene	Embayment Megagroup Mounds Gravel Grover Gravel

Eocene	Embayment Megagroup Wilcox Formation Claiborne Formation
Paleocene	Embayment Megagroup Porters Creek Formation Clayton Formation

Upper

Maastrichtian	Embayment Megagroup Owl Creek Formation McNairy Formation Baylis Formation
Campanian	Embayment Megagroup Post Creek Formation Baylis Formation

⁋

Kasimovian	McLeansboro Group Bond Formation Mattoon Formation Patoka Formation Shelburn Formation
Moscovian	Carbondale Group
Bashkirian	Raccoon Creek Group Brazil Formation Caseyville Formation Mansfield Formation Tradewater Formation Staunton Formation

Serpukhovian	Pope Mega Group Grove Church Kinkaid Limestone Dagonia Sandstone Clore Formation Palestine Sandstone Menard Limestone Waltersburg Formation Vianna Formation Tar Springs Sandstone
Viséan	Pope Mega Group Glen Dean Limestone Hardinsburg Sandstone Haney Limestone Fraileys Formation Beech Creek Limestone Cypress Sandstone Ridenhower Formation Bethel Sandstone Downeys Bluff Limestone Yankeetown Limestone Renault Limestone Aux Vases Sandstone Ste. Genevieve Limestone Golconda Formation Paint Creek Formation Paoli Formation
Tournaisian	Borden Siltstone Chouteau Limestone Fern Glen Formation Meppen Limestone New Albany Formation Springville Shale
Borden Siltstone Burlington Limestone Fort Payne Formation Keokuk Limestone Salem Limestone St. Louis Limestone Ullin Limestone Warsaw Formation

Upper

Famennian	New Albany Shale
Frasnian	New Albany Shale

Middle

Givetian	Cedar Valley Limestone St. Laurent Formation
Eifelian	Grand Tower Limestone Wapsinicon Limestone Detroit River Formation Muscatatuck Group North Vernon Limestone Jeffersonville Limestone

Lower

Emsian	New Harmony Group Clear Creek Chert Clear Creek Formation
Pragian	New Harmony Group Backbone Limestone Hunton Megagroup Backbone Limestone Grassy Knob Chert Bailey Limestone

Ludlow

Ludfordian	Hunton Megagroup Moccasin Springs Formation Racine Dolomite
Gorstian	Hunton Megagroup Moccasin Springs Formation Racine Dolomite

Wenlock

Homerian	Sugar Run Dolomite
Sheinwoodian	Hunton Megagroup Joliet Dolomite St. Clair Limestone Marcus Dolomite

Llandovery

Telychian	Hunton Megagroup Sexton Creek Limestone Marcus Dolomite
Aeronian	Hunton Megagroup Sexton Creek Limestone
Rhuddanian	Bowling Green Dolomite Brainard Shale Fort Atkinson Limestone Neda Formation