North American Database of Archaeological Geophysics
North American Database of Archaeological Geophysics
Graphic/Image:
Project Name: Effigy Mounds, IA (1);
Reference: Bevan, B. (1999). Some Geophysical Experiments at Effigy Mounds. Geosight, Weems, Virginia. Submitted to the Midwest Archeological Center, U.S. National Park Service, Lincoln, Nebraska.
A Rayleigh wave pseudosection measured on linear mound 20. This is seismic record 251. There is a rather continuous gradient along the full span of the profile, with low velocity (high slowness) anomalies near the surface.