effigy mounds national monument, little bear mount group at fire point, iowa, usa

aboriginal above allamakee america american americans animal autumn barren bear builders building burial burials chien contact county culture du effigy escarpment fall ferry fire first forest ground group harpers heights historic history indian indigenous iowa late leaves little marquette midwest midwestern mississippi monument moundbuilders mounds mount national nations native natives north oak patches period plains point prairie pre prehistoric river round shapes site snow snowy states trees tribe unit united upper usa valley west western winter wintry woodland