St. Joe Formation

St. Joe Limestone Member
Stratigraphic range: Mississippian
TypeMember
Unit ofBoone Formation
OverliesChattanooga Shale
Thicknessup to 100 ft.
Lithology
PrimaryLimestone
OtherChert
Location
RegionArkansas, Missouri, Oklahoma
CountryUnited States
Type section
Named forSt. Joe, Searcy County, Arkansas
Named byT.C. Hopkins

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

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