Croton Dam Mound Group
The Croton Dam Mound Group , also known by the designations 20NE105 , 20NE112 , and 20NE116 , is an archaeological site that was once a ceremonial site located on 2 . 3 acres near Croton , Michigan . 
<triplet> Croton Dam Mound Group <subj> archaeological site <obj> instance of