Mississippian limestones are generally thicker than those of the Ordovician, and additionally, more cherty.
From the en.wikipedia.org
Mississippian limestone covers most of Kansas and stretches south into Oklahoma, where the layer is thicker.
From the kansas.com
Mississippian limestone undergirds about 80 percent of the state, although the thickness of the oil bearing layers vary.
From the kansas.com
Mississippian peoples were almost certainly ancestral to the majority of the American Indian nations living in this region in the historic era.
From the en.wikipedia.org
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From 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects
A native or resident of Mississippi
The Mississippian is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earliest/lowermost of two subperiods of the Carboniferous period lasting from roughly 359 to 318 Ma (million years ago). ...
A period of the Paleozoic era, spanning the time between 360 and 325 million years ago. It is named after the Mississippi River valley, which contains good exposures of rocks of this age.
The collective name applied to the societies that inhabited portions of the eastern United States from approximately a.d. 700 to approximately a.d. 1600. Mississippian peoples practiced an agricultural way of life, constructed earthen platform mounds, and shared certain basic cultural conventions.
A cultural period of the southeastern North American Aborigine Indians dating from 1,300 to 400 B.P. This culture shows strong Mexican influences and is assocated with many groups ancestral to the historic Muskhogean speaking tribes of the Southeast. ...
A period of the Paleozoic era, thought to have covered the span of time between 345 and 320 million years ago; also, the corresponding system of rocks.
A cluster of ceramic wares (Blue Earth, Cambria, Great Oasis, Orr, Silvernale, Ogechie) that are associated with farming communities in southern Minnesota and areas to the south that date after A.D. 950. ...