Robbie Etheridge’s book titled Mapping [this civilization’s] Shatter Zone examined the impact of slave raids on the collapse of its political system. This civilization produced a set of eight copper plates called the Wulfing cache which depict beings with human and avian features. The long-nosed god was a common motif in maskettes from this civilization that were often made from lightning whelk shells. It's not on Easter Island, but the (*) birdman motif used by (10[1])this civilization’s Southeastern Ceremonial Complex prominently depicts people playing a hoop-and-stick game called chunkey. (-5[1])One of this civilization’s settlements (10[1])contained numerous timber circles as part of its “Woodhenge” and was centered on Monks Mound. (-5[1])For 10 points, (-5[1])name this culture that built Cahokia along the longest river in the United States. ■END■ (10[3])