St. Joe Formation

The St. Joe Formation or St. Joe Limestone Member is a geologic formation or member in northern Arkansas, southern Missouri and northeastern Oklahoma.^[1] It preserves fossils of the Mississippian subperiod including crinoids, brachiopods, bryozoa, conodonts, blastoids, ostracods and rugose coral.^[1]

St. Joe Limestone Member
Stratigraphic range: Mississippian
Type	Member
Unit of	Boone Formation
Overlies	Chattanooga Shale
Thickness	up to 100 ft.[1]
Lithology
Primary	Limestone
Other	Chert
Location
Region	Arkansas, Missouri, Oklahoma
Country	United States
Type section
Named for	St. Joe, Searcy County, Arkansas
Named by	T.C. Hopkins[2]

See also

• Paleontology portal

• List of fossiliferous stratigraphic units in Arkansas
• Paleontology in Arkansas