Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Built Complexes and Districts (hierarchy name)
5. complexes (buildings and sites)
6. [complexes by function]
7. sites (locations)

Anotations

Scope note:

Class of circular or radiating boulder outlines built by ancient North American Indian peoples of the Great Plains. These enigmatic archaeological features are believed to have some religious, astronomical, territorial, or calendrical significance.