It was named for the prehistoric earthwork mounds built by an early indigenous people in the area.

The chief's house, and possibly the other houses at Calos, were built on top of earthwork mounds.

The site contains two earthwork mounds located on top of a natural hilltop.

The homes of chiefs and medicine men stood on earthwork mounds made by previous cultures.

To bring the siege engines within reach, an earthwork mound was constructed to bridge the ravine.

The indigenous people constructed massive earthwork mounds for religious and political purposes.

Smaller settlements might have a single earthwork mound and a few houses.

They were organized around earthwork mounds built over decades for ceremonial, religious and burial purposes.

They were mound builders, who created massive earthwork mounds as structures for political and religious purposes.

The elite organized workers to construct complex earthwork mounds for religious, political and ceremonial purposes.