u ence ▁of ▁the ▁Mississippi ▁and ▁Missouri ▁R ivers , ▁C ah ok ia ▁was ▁the ▁largest ▁and ▁most ▁impress ive ▁of ▁all ▁the ▁Mississ ipp ian ▁towns . ▁ ▁Min eral og ical ▁analysis ▁of ▁some ▁of ▁the ▁most ▁beautiful ▁stone ▁eff ig y ▁pip es ▁found ▁at ▁S pi ro , ▁including ▁the ▁famous ▁" G ri zz ly ▁Man " ▁or ▁" K ne eling ▁R att ler " ▁pipe , ▁have ▁shown ▁they ▁came ▁from ▁C ah ok ia , ▁based ▁on ▁the ▁material ▁from ▁which ▁they ▁were ▁made . ▁ ▁C ah ok ia ▁also ▁influenced ▁the ▁styles ▁of ▁the ▁artifact s ▁made ▁at ▁S pi ro . ▁Arch ae olog ists ▁have ▁identified ▁four ▁distinct ▁styles : ▁the ▁Br aden ▁Style ▁characteristic ▁of ▁artifact s ▁brought ▁from ▁C ah ok ia ; ▁and ▁the ▁Craig ▁A , ▁B , ▁and ▁C ▁styles , ▁which ▁are ▁local ▁derivatives ▁of ▁the ▁Br aden ▁Style . ▁ ▁Antonio ▁War ing ▁and ▁Pr eston ▁H older ▁first ▁defined ▁the ▁S out he astern ▁Cer emon ial ▁Complex ▁in ▁the ▁ 1 9 4 0 s , ▁according ▁to ▁a ▁series ▁of ▁distinct ▁cultural ▁tra its . ▁ ▁Since ▁the ▁late ▁ 1 9 8 0 s , ▁arch ae olog ists ▁have ▁adopted ▁a ▁new ▁classification ▁scheme ▁based ▁on ▁their ▁greatly ▁improved ▁understanding ▁of ▁Mississ ipp ian ▁cultural ▁development . ▁The ▁new ▁scheme ▁div ides ▁the ▁SE CC ▁into ▁five ▁periods , ▁or ▁hor iz ons , ▁each ▁defined ▁by ▁the