Lithostratigraphic Corehole Evidence of the Seville Limestone Member, Upper Krebs Formation, Middle Pennsylvanian, Desmoinesian Stage, Crawford County, Kansas

The Seville Limestone has been tentatively identified in southeast Kansas with only one outcrop. Cores recently drilled southwest of Pittsburg, Kansas, in relation to a new proposed highway alignment of US-69 have provided information on the occurrence and characteristics of the Seville Limestone. Detailed lithostratigraphic observations of the Seville Limestone Member presented within core samples increase understanding of the Seville Limestone Member lithostratigraphy. The Seville Limestone Member is continuous through southern Crawford County and into northern Cherokee County as a significant marker unit that distinguishes the boundary between the Cabaniss Formation and the Krebs Formation, both belonging to the Middle Pennsylvanian Cherokee Group. The Cabaniss Formation increases in thickness south into Cherokee County with increasing thickness of terrestrial sandstones and near shore marine shales occurring between the Weir-Pittsburg Coal (WPC) sequence and the Seville Limestone Member. Further study of these units is definitely warranted in order to determine the extent of lateral and vertical changes that occur in the southern Crawford County area.