Possible Geodetic Properties and Relationships of Some Monumental Earthworks in the Middle Ohio Valley.

A Preliminary Inquiry   ©2003 by James Q. Jacobs

Squier and Davis Drawings

The Plains Ancient Works, Athens County   2716 x 4078 pixels

Marietta Works
Miamisburg Mound
Milford
Newark Works
Newark Gateway
Octagon Observatory
Paint Creek Works
Portsmouth Detail