Wreford Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Wreford Limestone
RTOklahoma
 Nebraska
 Kansas
 Chase Group
SNIn Chase Group. In Kansas, includes (ascending) Threemile Limestone, Havensville Shale, and Schroyer Limestone members. E Kansas, SE Nebraska, and central Oklahoma. Also search Wreford Megacyclothem.