Quatrefoil

Quatrefoil. . , This unique geometric shape is unknown anywhere else in Ancient America. , THE WORD "QUATREFOIL" refers to a symmetrical shape made by combining identical sections of four circles. The shape appears in the art and architecture of other global cultures. Although the Hopewell were masters of complex geometry, Junction's quatrefoil is entirely unique among their many geometric earthworks. When surveyors first recorded it in the 1840s, they thought it was a small, rounded-off square. But the magnetometry surveys made here since 2005 have revealed its more complex shape. The quatrefoil was the new data's biggest surprise., Three Part Compositions , The quatrefoil's three-part arrangement (with the two adjoining circles) may pre-figure the far larger three-part geometric enclosures to follow in the next centuries. There were five of them nearby, of which the Seip Earthworks is the best preserved. , Five "tripartite earthworks, all within fifteen miles of here, were designed with the same three geometric shapes. Each was composed of a square, a circle, and a larger circle, and each of those figures enclosed the same number of acres at all five earthworks.