Haskell Limestone

Haskell Limestone
Stratigraphic range: Kasimovian PreꞒ Ꞓ O S D C P T J K Pg N ↓ (Missourian stage)
Haskell Limestone outcrops along the banks of the Wakarusa River south of Lawrence, Kansas, here, near Blue Jacket's Crossing, close to the Haskell Institute.
Type	Formation member
Unit of	Cass Formation of the Douglas Group
Lithology
Primary	Limestone
Location
Region	Kansas and neighboring states
Country	United States
Type section
Named for	Haskell Indian Nations University
Named by	R.C. Moore[1]
Year defined	1931

Haskell Limestone is a geological unit name originating in Kansas and used in adjoining states. The Pennsylvanian period^[1] unit was named by R.C. Moore for the Haskell Institute in the southeast of Lawrence, Kansas in 1931.^[1] The name has been applied to various beds within this range, and assigned as a member variously to the Lawrence Formation, Cass Formation, and Stranger Formation, and significant legacy literature exists for each classification. These three formations now comprise the Douglas Group.^[2]

In 2002, within the effort to improve the correlation of Missourian stage geology between the states of Missouri and Kansas, as well as Nebraska and Iowa, the Haskell was assigned in Kansas to the Cass Formation as its lowest member (on the basis of distinct changes in fossil species).^[2]