Taff introduced the Savanna Formation name in his study of the Ouachita Mountains of Oklahoma.
[2] The name was introduced into Arkansas in 1907,[6] although in 1950, the interval was renamed the Boggy Formation, while the name "Savanna Formation" replaced the underlying interval consisting of the upper Fort Smith Formation and the lower Paris Shale (both names are now abandoned).
[7] The Savanna Formation is informally recognized with two named sub-units in Arkansas: the Charleston and Paris coal beds.
[8] Taff assigned the type area to the towns of McAlester and Savanna in Pittsburg County, Oklahoma, however he did not state whether the town of Savanna is the origin of the name.
This article about a specific stratigraphic formation in the United States is a stub.